Engine oil Castrol or PENNZOIL

Have an 07 Silverado bought new first oil change switched over to Mobil one used that until one of the hurricanes hit Louisiana and started having a problem getting it so switched over to Pennzoil full synthetic. Truck has 368000 on it and seems to be still going strong so I’d say it’s your choice.

I use Pennzoil Platinum. Is it the best? Who knows, but I’ve been using it for years on several vehicles and never had an issue.

I’m using Pennzoil Ultra Platinum, really helped how effortless my acceleration is and gas mileage.

I use for 2 years Castrol 5w30 its perfect after for top up i use Ina (croatian motor oil) and works perfect

I tried to use the Pennzoil high mileage full synthetic the most, but if I didn't have the bit extra for it, I'd get Walmarts generic full synthetic high milage. I always used a Fram full synthetic filter too, they were the only ones around me that were better quality and decent price for the time. Mine got to 200k no problems!

Started running penzoil platinum in my mazdaspeed due to the great UOAs it got on DI motors, and just now run that in all my shit to simplify my life. Only have to keep one oil around that way.

My 2006 WRX has 323k on Castrol 10w-30.

I run Castrol GTX conventional oil in my 1972 Chevy C10 (350). I also ran that in a 1976 BMW 2002 I had in the 80s.

I'm using Castrol GTX 20W50 because it's the only 20W50 that I can easily find locally. I tried Rotella 15W40 but I found that it gave somewhat low oil pressure on my old engine.

I noticed when the castrol 508 spec wears. It smells Faintly of onions and beans. Strange smell indeed, when I took my car to street side VW out of Amarillo, Texas.