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Piston aviation engines by and large still require leaded fuel. This allegedly poses a problem for certain synthetic oils, for instance, Mobil AV-1 which was, as was, as I understand it, a mostly PAO/group iv base oil formulation. Reputedly, the oil could not adequately suspend the lead salts...

I have an experimental Super Cub type airplane that uses grease for main wheel & tailwheel bearings, stabilizer tubes/jackscrew, and tailwheel steering swivel bearing. The maintenance manual specifies Mobilgrease 28 for all of these parts. However, the tailwheel parts manufacturer specifies...

I purchased my first house 5 months ago. Built in 1999. There is a first floor garage with an epoxy floor and a drain with a p-trap. So far 3x I’ve come downstairs to a 7-10 ft diameter puddle of sewage in the midddle of the floor. There is one guest bathroom upstream of this drain and that...

On the samples I submit to Polaris through their Horizon app I’ve been indicating in my comments that I want GC fuel dilution and base number testing. It has not been a problem over the past 6 months with no upcharges. I want to avoid a situation where they don’t give me GC fuel dilution...

I recently acquired this John Deere X738 “tractor”(?). As best I can tell it is a 2013 model with 88 hours of run time. It came with a snowblower, snow plow, and 48” mower deck. I will use it about 10 hours per year in winter at temps from -20 to 30F mostly with the snow blower attachment to...

This was a 4100 mile run of Mobil 1 Advanced Fuel Economy 0W-30 in a '23 Ford Bronco with the 2.7L ecoboost twin turbo on a Fram Synthetic Endurance cartridge filter; 24,500 on the odo. It was mostly 6 months of winter short trip city driving with a 700 mile road trip about 3000 miles into the...

Ran this 12 year old generator for 16 hours on this oil over 7 months with a Kohler brand filter. This was about 4 hours of runtime from its twice a month 20 minute maintenance runs and 12 hours during a wind storm. It is a whole-house standby 38kW generator with 195 hours total run time. It...

Again new to this so let me in on any feedback. This was run on a Lycoming IO-360 Airplane Engine for 25 hours. These filters tested 99% at 40 microns as discussed here. Flashlight Test Measured can thickness at 0.7mm. 8 hole endcap and 2 piece anti-drain back valve? Metal Core with...

First time doing one of these on BITOG so I'm open to any criticisms or feedback. I only ran this filter for about an hour on a Kohler 38RCL 38kW natural gas standby generator with HPL Premium Plus PCMO 0W-30. I didn’t trust it after all the bypass leak reports on here and wanted to do a...

Hello, Where I live the average winter low isn't too cold, 10F or so, but the roads are treated with a lot of gravel, sand, and sometimes chemicals (urea, I think, so not as bad as what some other states use?). For the last decade or so I was driving older cars and they lived outside, I...

I thought this video had some good overlap with the chemistry themes of BITOG. Apparently the forced early adopters of the new unleaded 100 octane G100UL fuel for piston powered airplanes in California are having issues with paint, o-rings, and potentially seals inside of fuel tanks. This is...

This is an Oil Analyzers/Horizon Aeroshell W15W-50 Ashless Dispersant Aviation Piston Engine Oil VOA with 5% by volume ASL Camguard Added. It is marketed as “A semi-synthetic blend of base oils integrating ashless dispersant technology and advanced non-metallic anti-wear and anti-rust additive...

Looking for a quick sanity check - have two, 2 year old Fords with the 10R60 transmission that specify Mercon ULV fluid. I’m replacing the plastic trans pans with PPE aluminum pans, changing the filter, and doing a fluid exchange at ~20k miles. Warranty is 5yrs/60k. The local Ford dealer is...

Bottle said B2425C5 23:05 which I interpret to mean it was made in February 2025. I'll plan to use this oil permanantly in this Bronco. Changed from M1 AFE 0W-30. I'm not sure why I got TAN and no TBN, last time I wrote in the remarks "request TBN" and they called me and said they always...

Vans Air Force Oil Filter Test I didn’t find a thread discussing this here in a search, so feel free to link to it if I missed it. The testing was mostly geared toward assessing the effectiveness of the reusable challenger/k&p filters compared to disposable filters, in part due to...

Hello, I have a 2013 Kohler 38RCL 38 kW standby generator. It contains a GM 4.3L 6 cylinder "VORTEC" engine, similar to one that came in GM Vans/Light trucks around 2013. It came with a house that I bought and runs on natural gas. My electric bills were $600 USD/mo when I moved in, which I was...

Hello, I recently acquired a “Kohler 38RCL” natural gas powered 38kW standby generator that came with a home. It was installed in 2013 and maintained semi-annually by a prior owner through service vendors. The generator contains a 4.3L naturally aspirated GM Vortec V6 as best I can tell. It...

These are unused/virgin analyses of High Performance Lubricants Premium Plus Passenger Car Motor Oil 0W-30 purchased January 2025. Just for fun, I sent 3 labs (Blackstone, Oil Analyzers, SpeeDiagnostix) samples from the middle part of the same bottle of this unused oil. Oil Analyzers/Horizon...

Just for fun, all 3 taken from the same oil drain. Main differences seem to be fuel dilution (Speediagnostix showing ~1/2 Oil Analyzers and Blackstone "estimating" less than 1/5th OA); then big differences in Ca & Mg between the SpeeDiagnostix report and the other two. Switched this vehicle...

I’ve read that using consumer grade used oil analysis to compare the relative suitability of different oils doesn’t produce reliable information, but sometimes I have to learn things the hard way. It gets boring where I live and I’m always looking for entertainment. My spouse and I drive the...