quote:
Originally posted by outrun:
I think we have insufficient oil analysis submissions to make a valid vice-versa statement.
I do agree that we need more data, but at the same time, out of the UOAs we have seen on this oil, not a single one of them stands out as being an "awesome report". But yet RP would lead you to believe their oil is the best oil out there.
quote:
As one mechanic friend put it to me:
"The worst synthetic (group III+, PAO, etc)is always better than the best standard oil"
I don't believe this to be true at all. The best standard oil, IMO would have to be Schaeffer's full mineral oil, and it is definitely better than many synthetics sold on the market today, including Royal Purple.
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Food for thought. Indeed Patnam's recent analysis was everything but commendable. Then again a harsh salty Ontario winter will do a number on any car.
My sister's car and my car both went through this winter too, and neither of our oils thinned out whatsoever. My TBN was low and iron was high, but I also have an engine that takes a long time to warm up and the car was parked outside. My wife's car is parked inside and it warms up considerably faster than mine. So her oil really wasn't subjected to the winter like mine and my sister's car's oils were.
Like I mentioned here recently, my new plan is to go back to my old plan with Royal Purple, and that is to run this batch out to about 5k (which will be in the fall) So this oil will see no extreme cold at all, in other words perfect conditions. I won't be satisfied with the results if I don't see 9ppm or less with the iron, lead, copper and aluminum. I don't think this is unreasonable for this engine, it came very close to that on the 5k run with the old SJ formula of Mobil 1 last year, the wear metals were:
Iron-9
Lead-11
Copper-3
Aluminum-2
If Royal Purple is as good as they say, then it should easily be able to beat Mobil 1's 4 year old SJ TriSynthetic formulation. FWIW, that 5w30 M1 in my wife's car had a viscosity of 10.2 and a TBN of 9, so it's not like my wife's engine or driving habits are particularily hard on the oil.