BobIsTheOilGuy

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Euro HPL 5W30 or 5W40 for an LCI G30?

BITOG Sponsors

A List of our current SITE SPONSORS.
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Amsoil Sponsor

Lubrication and General Automotive

Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

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1.4M
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64K
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1.4M
How big is your stash, hoarders?

Heavy Duty Engine Oil (HDEO) - Diesel Vehicles

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4.7K
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78.7K
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4.7K
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78.7K
Mack Truck laying off 100s in PA & MD

European and Import Motor Oils

ACEA and Euro OEM spec oils.
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4.5K
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96.8K
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4.5K
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96.8K
Where did this QS oil come from?

Mechanical/Maintenance Forum

Post all your maintenance and mechanical problems and tips here.
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639.2K
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37.7K
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639.2K
“Inspect valve clearance”

Automotive General Topics

A general auto forum - not for maintenance questions/problems.
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24.9K
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643.2K
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24.9K
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643.2K
How long does it take to build a 2025 Ford Transit?

Electric Vehicles

Discuss all things about electric vehicles, EV batteries, EV technology, etc.
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64.7K
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1.4K
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64.7K
Vinfast, what on earth are you doing - VF8 and VF9 test drive and failed attempt to lease a VF8

ATF, Differential, Trans, Brakes, P/S

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261.2K
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261.2K
Is there any real difference in diff/transfer case oil qualities?

Vehicles

Thinking about buying a new vehicle? Do you own a vehicle and would like to share your experiences?
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307.1K
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9.4K
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307.1K
If you have ever felt someone is watching you, it could be your car

Tires & Wheels

Tire Talk!
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182K
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182K
Pirelli AS Plus 3 or Michelin Defender LTX MS 2

Paint, Detail and Wax

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84.1K
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5.5K
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84.1K
Headlight Lens Restorer Report

Tool Time

Discuss tools and gadgets
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83.6K
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Bought me a milling machine...
  • D60

Cooling System Fluids & Additives

Dex-Cool, G-05, G-12, Green, Red, Yellow, and Orange...it's all here!
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58.4K
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4.3K
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58.4K
Trouble adding coolant/water to empty cooling system 3800

Racing Oils/Engines/Cars/Teams/Drivers

Forum for all things racing.
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34.2K
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2.1K
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34.2K
Thinking of going to Mid Ohio

Automotive Electrical

Batteries, Electrical Systems, Lighting, Charging, Online Service Systems, etc
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51.8K
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2.9K
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51.8K
New Walmart 24F battery -2 yr warranty

Grease

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2K
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20.2K
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2K
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20.2K
“Husqvarna Special Grease”

Oil Industry and Related News

Posts about the oil industry.
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865
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17.1K
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865
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17.1K
U.S. Diesel & Gasoline Weekly Fuel Cost Update 04-14-2025

Heavy and Industrial Lubrication

Tractor Fluids

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123
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1.7K
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123
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1.7K
Old stock Kubota Super UDT2, safe to use?

Heavy Equipment and Industrial Oils

Sponsored by High Performance Lubricants
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509
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4.9K
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509
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4.9K
What weight oil for finish mower gear box?

Hydraulic Fluids

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390
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3.3K
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390
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3.3K
Switching from atf to hydraulic fluid in log splitter.
  • chorty

Penetrating Oils/Cleaners/Solvents

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529
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6.7K
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529
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6.7K
Is marvel mystery oil the best carburetor cleaner?
  • Zee09

Industrial Off Topic

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245
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2.7K
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245
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2.7K
What happened to the hobbs meter?

Oil Analysis Reports

Used Oil Analysis - Gasoline

Post your UOAs for gasoline engines here.
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188.1K
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12.4K
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188.1K
M1 EP 5w30 3161mi 4months Subaru Outback XT 2.4L FA24DIT

Used Oil Analysis - Diesel

Post your UOAs for diesel engines here.
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1.6K
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18.5K
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1.6K
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18.5K
2009 Ford F-350 Detroit Silver 4-53T, Rotella T1 40W 12,600 kms.

Used Oil Analysis - Motorcycle and PowerSports

Post your UOA results for Motorcycle and other small engines here
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662
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8.7K
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662
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8.7K
Aeroshell 15w-50, 24 hour interval, Experimental Cub, Lycoming IO-360-EXP128

Oil Analysis - General Questions and Comments

Post general oil analysis questions and comments here
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877
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9.7K
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877
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9.7K
Who To Choose?

Virgin Oil Analysis - PCMO/HDEO

This is for New oil samples, not used.
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1.7K
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27K
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1.7K
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27K
VOA Database

Gear, Transmission, Hydraulic oil analysis

Virgin and Used Gear, Transmission, and Hydraulic Analysis reports.
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806
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7.8K
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806
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7.8K
2023 Subaru WRX (VB) - 6MT Transmission Factory Fill UOA - 11,657kms

Coolant Analysis

Virgin and Used Coolant Analysis Reports.
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59
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583
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59
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583
Detroit PowerCool Plus OAT-Prevost Bus/MH

Filtration

Engine Oil Filters

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21.3K
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370.9K
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21.3K
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370.9K
VIRGIN K&N HP-1002 CUT OPEN

Engine Oil Bypass Filters

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1.3K
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17K
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1.3K
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17K
small engine bypass filtering.

Engine Air Filters

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2.2K
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32.7K
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2.2K
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32.7K
Post your latest engine/cabin air filter change

Transmission Filters

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177
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2.2K
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177
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2.2K
Allison 1000 filter cut open

Cabin Air Filters

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246
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4K
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246
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4K
Post Your Latest CAF Change!

Other Filters (Fuel, hydraulic, steering, etc)

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252
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2.2K
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252
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2.2K
New fuel filter won't flow gas?

Science and Technology of Oils and Lubricant Addit

Interesting Articles

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11.7K
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1.1K
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11.7K
The Challenges of Bringing Innovation to PCMO

Question of the Day

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416
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416
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Exhaust and Intake Valve Diameters

White Papers and Technical Discussions

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199
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3K
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199
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3K
EV-Fluids

Motorcycles, Boating, Small Engine, Aviation, Powe

Motorcycles and Motorcycle Lubrication

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4.8K
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82.7K
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4.8K
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82.7K
Aging, loss of strength, and large bikes (like a Harley)

Boat/PWC Lubrication

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1.2K
Messages
14.5K
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1.2K
Messages
14.5K
Best 2 stroke oil for small old outboards premix

Lawn Mower and Small Engine

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9.1K
Messages
147.8K
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9.1K
Messages
147.8K
Briggs 190cc Quantum burning up - too hot

Aviation

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1.7K
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36.5K
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1.7K
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36.5K
The Hudson Helicopter Crash
  • edyvw

Power Sports

A forum for ATVs, snowmobiles, and other power sport vehicles.
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665
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7.4K
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665
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7.4K
04 Yamaha Kodiak 400 engine oil

Fuels / Fuel & Oil Additives

OTC and Third Party Oil Additives

Discussions about Over The Counter and Third Party Oil Additives.
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8.3K
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112.7K
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8.3K
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112.7K
Do you miss the days of Everything PTFE / Teflon? Any positive snake oil experiences?
  • TiGeo

Fuels and Fuel Additives: Gasoline and Diesel

Discussions about Fuels and Fuel Additives.
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4.3K
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74.6K
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4.3K
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74.6K
cheapest 91 octane + techron bottle vs 91 octane from top tier station for regular fills?

Alternative Fuels

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470
Messages
7.5K
Sub-forums:
  1. Gas Engine Alternate Fuels
  2. Diesel Engine Alternative Fuels
  3. Biodiesel & Waste Vegetable Oil
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470
Messages
7.5K
So which fuel am I buying?

General and Off Topic

Recreational Vehicles and Travel

General and Off Topic

NO Religion/Sex/Politics
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44.7K
Messages
1.1M
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44.7K
Messages
1.1M
How much a family of four needs in annual income to afford a single family home

Home Improvement Projects and Home DIY

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378
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8.9K
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378
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8.9K
Clean dishwasher or leave it alone

Humor

Jokes and Funny stories
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45.2K
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5.5K
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45.2K
This is what happens when a cook puts mustard on a hot dog instead of ketchup in any town in America that knows how to make a hot dog
  • goblin

Photo Section

A place to post photos without affecting other threads
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3.6K
Messages
90.8K
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3.6K
Messages
90.8K
Bought a new lens today
  • Kira

Firearms: Lubes, Cleaners, & Maintenance

Topics relating to Firearms and Firearms Maintenance
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3.5K
Messages
75.7K
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3.5K
Messages
75.7K
Breaking in a new gun....Glock 42

Foods/Cooking/Beverages

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3.4K
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103.2K
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3.4K
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103.2K
Popeye's pickle menu

Bicycles

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880
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13.9K
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880
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13.9K
Yay for studded bike tires
  • Pablo

Computers

Discuss computers, software and hardware here
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109.1K
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7.2K
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109.1K
Several Dell Windows 11 cannot use wired Ethernet but can use WIFI

Consumer Electronics

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2.9K
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55.8K
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2.9K
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55.8K
Window AC: to replace or not to replace
  • Rand

Test Forum

Test your posts and pictures here. Anything older than 30 days will be deleted
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1
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8
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1
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8
Copy & Paste from Amazon

Marketplace

Items For Sale / Want to Buy

All threads more than six months old will be deleted
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51
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342
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51
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342
2007 Honda Civic Si 210k. 2 owners Hondata Tuned central NJ

Product Rebates, Sales and Promotions

Current product rebates, sales and promotions of OTC products
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197
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4.7K
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197
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4.7K
Apple MacBook Air M1 at Walmart

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