High oil Temp... It finally happened to me

kellyefields

there may be another factor as well. How old is your oil. I found that the older the oil the faster the temp builds. If I have fresh oil my temps stay lower. I always use royal purple and and the royal purple filter but I went ahead and put a 34 row oil cooler on anyway just for planning on future mods and since then i do not break 210 even in stop and go traffic. You shouldnt have to go that big but I like it.

houkouonchi

I believe my last oil change was around 2500 miles ago.

ImportConvert

Royal Purple shears relatively fast compared to other premium oils. The longer you run it, the thinner it shears down. The more it shears down, the less it protects, the more friction you have. With a more stable oil, what you are noticing won't be nearly as apparent.

Endgame

Not arguing here, but why is Royal Purple 'expensive' then? If it does this, I do not understand the hype about it. Is it just a percieved believe the 'brand' is better than most? I ruled our RP a while back because of the above dynamic and would get Mobil 1 over RP.

Am I missing something?

ChrisSlicks

They spend millions on advertising to the race/hot rod crowd. For race car engines they are going to change the oil after every event so long term viscosity break down isn't a big concern. It is a huge concern for street cars, and the VQ's in particular don't get very good results from RP on the oil analysis.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

ImportConvert

Because of that exact opinion."It's expensive so it must be good". People buy into that all the time, and this is no exception.

Just google "Royal purple shearing" and you will find tons of UOA's and other lab tests that back up what I have stated.

Endgame

cool deal... thinking i will be going to Red Line soon regardless....

ImportConvert

I think Penzoil Platinum is the best deal going based on a price/performance standpoint. Check out how it does:

Motor Oil Comparative Test

I mean, it's not the best, but its close enough that I doubt you would notice.

That being said, I used to run Castrol Syntec 0-30 and my car used 1/2qt every 4500 miles. With the Mobil 1 5-30 EP, it used 1qt every 2500 miles.

Some cars just HATE some oils. The cSt for the M1 was around 10. The cSt for the GC was around 12. That engine liked oils from 11.5-12.5 or so. The VQ probably has tighter tolerances and I would guess it likes oils in the 9.5-10.5cSt range at operating temp.

Since it DOES tend toward the warmer side, NOACK volatility #'s are more important with this engine than an engine not as prone to seeing high temps.

A good oil is so much more than a full-page color add in a hotrod magazine.

Here is why I ran 0-30GC in my LS1 car (aside from the fact that it DRANK! mobil 1 and barely sipped the GC):
http://www.c66racing-synthetics.com/...20Analysis.htm