German Castrol
Just make sure when you look on the back of it says Made In Germany and not Made in USA. It usually has some type of red "European Formula" on it too.
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Yeah, I can't find the thread right now but Patmon tested it out after running it in his C5 LS1 until the oil change indicator came on and it really good oil, I think right behind GC and A LOT cheaper and easier to find.
never ran the german castrol, might give that a try next time.
right now im using carquest synthetic, 5-30
its made by valvoline, no consumption issues, oil pressure stays great, and its like $2 a quart. i never would have thought of it but my friend runs a 67 camaro in super stock and runs that and royal purple on the points meets, he says that the carquest does just as well, the royal purple is just for contengency money.






