My GS is due for an oil change, its about 1k miles over the oil monitor Wich is slow to tick down.. probly 8-9k on the royal purple 5-30, many sub zero starts, I'll send this in and post results here if anyone's interested.
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Never ran at the track but had thousands of 0-80 full throttle launches more than half TOWING THE BOAT!!
I started using Mobil 1 in 1987. When the twin Turbo Callaway Corvette came out the warranty was void if any other oil was used.
I went 210,000 miles on an un opened engine, more than half of it towing my boat. Pedal to the floor at every light because it was fun. Finally spun a bearing.
Nobody cares about that. You can read the numerous oil cooler threads (pretty much just as much as a clusterf**k as any oil thread).
People go back and forth between ''it's not needed'' to ''GM must have put it there for a reason'' to ''our cars are making twice the HP of stock and you want to delete a cooler by default?" (< that one is me
I've never seen any ''Well according to my before/after tests with a temp probe......."
Which kinda circles back to me saying that today's oil is much better than oil from 30 years ago. It would appear that MANY modern oils can put up with the extra load and heat.
a couple of reasons.the oil looks the best for the longest,i run methanol.never did it for oil pressure but after hit after hit pressure is never low, and my engine builder said the bearings looked mint when he took it apart,i have never lost a turbo or oil pressure due to bearing failure.i also have a source that did alot of research into oils and claimed the mobil 1 syn tested the best.i cant go into who he worked for at the time or how it was tested but he is a solid guy.
its more how everything looks inside the motor and how the oil comes out.
all good.
