Thinking of Rotella T6, thoughts?

[Tippy]

Been running Valvoline VR-1 forever, but have read too much oil pressure in most turbos is not recommended (straight from OEM turbo literature). At cold start, my gauge pegs and stays there for quite awhile; clearly over max recommendation for idle pressures.

Maybe a 40 weight would be better? My only concern is Texas gets really hot.

Diesel oil, yay or nay?

[Noah930]

I'm not sure if there's a Rotella good for our cars, anymore. Last time I looked, I couldn't find anything I was happy with regarding viscosity and zinc levels. Chevron Delo is OK, though.

[quattrorunner]

I've been using it because I thought it was up to standard zinc needs but now not sure. My engine leaks so much I can't feel good about mobile vtwin prices.

[JFairman]

Originally Posted by Tippy

Been running Valvoline VR-1 forever, but have read too much oil pressure in most turbos is not recommended (straight from OEM turbo literature). At cold start, my gauge pegs and stays there for quite awhile; clearly over max recommendation for idle pressures.

Maybe a 40 weight would be better? My only concern is Texas gets really hot.

Diesel oil, yay or nay?

I use 20w50 VR-1 in Florida and the gauge doesn't peg on cold starts. It doesn't in winter when it's 40 to 50 degrees out either.
Sounds like the oil pressure relief valve is stuck on yours.

Get under the motor and remove the threaded plug for it in the bottom of the case slowly and the spring and valve piston will slide out or it might take one of those skinny magnets you can buy to reach in there any pull it out so you can inspect it.

It's possible it got stuck at TDC in it's cylinder so it isn't being pushed down compressing the spring by oil pressure to where oil can pass out holes in the side of it's cylinder.
Sometimes people put washers or a 6mm nut inside the piston to shim up the spring tension to raise oil pressure a little. If you find any in there try removing them and see how it works.

[Tippy]

It always pegged gauge and I rebuilt the engine awhile back. Everything was smooth, don't think it's sticking.

Hmmm.

My oil pressure gets down to 1.2-1.5 bar at idle when it's over say 100 degrees out. That I'm not liking, but I know it shouldn't really be an issue as there's no load. Just hate thinking a 50 weight being so low.

[philip j]

Originally Posted by Tippy

It always pegged gauge and I rebuilt the engine awhile back. Everything was smooth, don't think it's sticking.

Hmmm.

My oil pressure gets down to 1.2-1.5 bar at idle when it's over say 100 degrees out. That I'm not liking, but I know it shouldn't really be an issue as there's no load. Just hate thinking a 50 weight being so low.

Hi Tippy, my newly rebuilt engine used to peg also with Bradd Pen 20/50. This year I started using Shell Rotella 15/40 and the guage is back to normal, or should I say it reads as when the stock engine configuration was in the car. The Rotella being 1/2 the price is also a bonus. Philip

[Tippy]

I may give this stuff a try unless someone tells me I'm being stupid for doing so....

[xbmwguy]

I've been running it for a while now. I change oil every 2 k or so.

[16Volt]

Not that its much of an endorsement but Subie guys swear by the stuff.

[IMR-Merlin]

The only T6 that I have seen is 5w40

[Tippy]

I've been running it for a while now. I change oil every 2 k or so.

You change 8+ qts every 2k miles?!?! Holy moly.

[philip j]

Originally Posted by IMR-Merlin

The only T6 that I have seen is 5w40

Sorry, I didn`t read the heading! I run Dino. Philip

[Tippy]

Happy with the dino? I'm going T6 for the turbos sake.

[philip j]

Originally Posted by Tippy

Happy with the dino? I'm going T6 for the turbos sake.

I have no issues with the Dino, and never have used synthetic. My oil return goes to the crankcase vent/not the oil tank. I believe yours goes to your oil sump? Any way, I've never had a coking issue. Philip

[Speedy Squirrel]

philip j, you have changed your turbo two times that I know of. They are not on your car long enough to coke!

[Speedy Squirrel]

What's the point? Mobil 1 and Rotella T6 have about the same ZDDP, and the diesel oil does not have the high rev anti foming additives as an automotive oil.

[Tippy]

So anti foaming is the only additive missing?

[Mike80911]

Sorry nothing to add about good or bad with Rotella. But I was reading that Porsche now offers their own brand of oil for older 911's Has anyone tried that yet?

[philip j]

Originally Posted by Speedy Squirrel

philip j, you have changed your turbo two times that I know of. They are not on your car long enough to coke!

HA! HA! 4 turbos in 5 years, I think the GT35R is here for a while! or maybe I should have gone with the T-4 after all !!! The winters are long here above the 49th.

[patina]

20w-50 Valvoline VR1 or Kendal GT1 is all I have ever ran.