List of vehicles/engines GC has been used in.

[CONMCK]

2001 GMC 1/2 ton Sierra ECSB 4X4, 5.3L, 5000lbs+
UPD aftermarket air intake,
Westers power programmer,
Approx 310 HP @5600rpm, 23 mpg hiway,
15.7 @ 88mph 1/4 mile,
Up to 6000miles/10000km OCI, no make up oil.
Oh,and very satisfied with UOA results.

 

[steven88]

2005 Toyota Camry 2az-fe....GC GOLD @ 5000miles....noticed a slight drop in gas mileage on the first tank...we'll see how it holds on the next tank...oh btw, chevron 87 octane here...

 

[shanneba]

2003 BMW 330Ci 28000 miles. Quieter at startup, no change in mileage over BMW 5w-30. Wear reduced compared to the BMW 5w-30. No consumption. Coldest startup oil temp so far is 37F.

 

[Jason8691]

77 Chevy 350
05 GTO 6 liter

 

[Captain Howdy]

'02 Nissan Sentra GXE 1.8L.

 

[AndyH]

2005 Subaru Impreza WRX STi (2.5L turbo-charged 4-cylinder; 300HP stock, "chipped" up to 325HP currently)

Been running "green" GC for the last 4,300 miles, will run it out to 5,000 miles at which time I will have a UOA performed (with TBN). The engine seems to be a bit quieter with this oil (versus the Mobil 7500 10w-30 I was using prior). Engine initially felt slightly sluggish to rev, but over time either that sensation has disappeared or I have grown accustomed to it.

 

[LVHospiceRN]

2001 Chevy S-10, V-6

1999 Saturn SC-2 4 cyl.

 

[t0ked]

1993 Lexus SC300 l6 2JZ-GE

 

[DeaconBlue]

Green GC with larger PF52 sized M1 filters;

'00 Pontiac Grand Am 3.4L, 56K miles, noticeably quieter at startup with smoother idle, no drop in mileage, consumption reduced but not eliminated vs. Xw-30 M1 SM rated, no UOA data, intake gasket fixed

'01 Buick Century 3.1L, 43K miles, noticeably quieter at startup with smoother idle, slight increase in mileage (70% highway use) vs. Xw-30 M1 SM rated, no consumption with either oil, no UOA data, no intake gasket problems as of yet (knocking on wood)

 

[bretfraz]

'04 GM 5.3L Vortec V8 - Engine noticeably quieter on start up vs. previous Mobil oils. No major changes in mileage. 6000mi OCI.

'00 Saab 3.0L Turbo V6 - Like the V8 above, engine much quieter on AM startup compared to Mobil One 10-30. Fuel mileage was about the same. 6500mi OCI.

 

[armasteel]

1996 Pontiac Trans Am - when I used M1 5-30, the valve train sounded harsh and made me nervous at the stock 5800 rpm rev limit. With GC, the engine sounds and feels so much more solid at high rpm, that I reprogrammmed my rev limiter to 6200. At the drag strip, it's almost a tenth quicker since I can go through the traps in 3rd gear at 6000 rpm without having to shift into 4th. Gas Mileage: don't know, don't care.

2003 Honda Element - This vehicle is pretty heavy, and I drive it hard. Much smoother and no noticable change in gas mileage from the Penz 5-20 I had in it before.

 

[Dark Jedi]

2003 Dodge Dakota Quad Cab 4x4 4.7L V-8 5 Speed Auto Tranny. engine is really quiet sometimes I think I have a 4 banger in there. the rough feeling is gone after getting rid of the M-1 5w-30. Havent dogged it yet with hitting the rev limiter but leaving for home tomorrow and getting on the interstate I love to gun it. dont care about gas mileage as its a V-8 it sucks gas to begin with

 

[wilnis]

2003 Volvo S40. So far so good, including -12F start in Iowa. Plan on 7500 miles with OEM Mann filter. Mileage is a little down from M1 10-30 but it's cold outside and I'm sure that plays a role. Bill

 

[Juicer69]

2005 Saturn Ion Redline
2.0L Supercharged Ecotec.

 

[Tom300M]

2000 Chrysler 300M 3.5 V6, first changed to the gold in August and noticed a smoother sounding starting start-up compared to the M1 10W-30 which had been in there. Its still in there with about 5500 miles on it and has started nicely on 10-15 degree F mornings.

 

[JAG]

03' VW GTI 1.8T. Using the Gold GC for 1st time (have 5000k miles on it now and will change it soon) and engine starts up without the chatter in cold weather that all of these oils caused:
M1 0W-40, Valvoline 5W-40, Amsoil 5W-40.
Turbo lag is slightly but noticeably decreased too. Gas mileage is the same as far as I can tell...I expected it to improve but no. No oil consumption with any of these oils.

 

[cmstpprr]

2005 Kia Sedona 3.5L V6 First OCI after facory fill M1 10W-30 7500 miles. GC since November (1200 miles) can't here or feel any difference. Cold starts at 0 degrees F no problem. Gas milage sucks during winter here in Wisconsin.(reformulated gas, cold temps and winter tires)

 

[blupupher]

2004 Hyundai Elantra, 2.0 gas. Great UOA @ 7500 miles.

 

[Bowser]

1990 Chevy Silverado HO 5.7 GC Gold with Amsoil SDF 24 6k OCI
2001 Chevy Silverado 5.3 Vortec GC Green with Amsoil Ea 064 6k OCI
2002 GMC Sierra 5.3 Vortec GC Green with Amsoil Ea 064 6k OCI

 

[Pick]

2004 Chevy Malibu, 2.2 L Ecotech 1 OCI
Cub Cadet Mower, 15 HP Kohler Command 3 OCI's
Honda EU2000i Generator, 4, OCI's
Roto Tiller 5.5 HP Intek B&S 1 OCI

No problems with any of these engines.