Quote:
...I did a UOA and posted it here, had some HARD miles on the RP and it did fine, I posted it as 10-40 but was actually 5-30.
But the cost difference in these two oils is significant.
The
UOA you posted showed 4.7K miles including track days, a hot rod tour, and auto-xing on RP 5W-30 that ended up with a borderline 30 weight viscosity (9.96 cSt @ 100C) despite the fact that you added
two quarts of oil during the same time frame. Without the make up oil, the viscosity would have been borderline. The make up oil should have resulted in a higher viscosity since it shouldn't have sheared down any faster than the oil in the sump. That leads me to believe the original RP sheared out of grade, and that's why I wouldn't use RP in my engine.
You have said before on other forums that Redline Oil and now Pennzoil Ultra Euro is too expensive. Please keep in mind that rebuilding a worn out engine is more expensive than maintaining your current engine. Running a high performance engine on high performance oil is money in the bank so to speak.
In 45 years of drag racing, SCCA Club Racing, and auto-xing, I've gone through a lot of oil, but never lost any engine to oil related problems. My daily drivers have gone over 261K miles on Redline Oil which includes track days and at least 18 auto-x's per year. That's why I think of premium oil as an investment rather than an expense. However, that's just my opinion and YMMV.
I never said the Pennzoil Euro was too expensive, Redline on the other hand is kinda pricey.
I haven't looked to see if I can the the Pennzoil Ultra Euro locally but will this weekend.
I understand what you are saying with the RP, this engine and most all LS1/6 based engines use oil when being run hard, so I always take 2 extra quarts with me to an event and usually it will at least use a 1/2 quart a day minimum. I keep an eagle eye on it at the track.
I am leaning towards trying the PUE(new acronym?) and see what it does on a UOA.
