What Race Oil do you trust?

[Rusty Davenport]

Please don't let me steal the thread, but has anyone tried the Mobil 1 dedicated Racing Oil----not the off the shelf....they have a dedicated oil product, check the Mobil 1 racing website if you haven't already.

[Wade_Owens]

Looking into Penrite Oil, looks very interesting....

Wade

[Alan Roehrich]

Originally Posted by Bob Gullett

I used to use the Joe Gibbs XP-1 5-20. Never again. Extreme sludge created by this oil pluging oil filters. Just about cost me an engine. Now I use 10-30 Valvoline race oil. No issues and runs clean.

The Joe Gibbs oil does not deal with blow by, fuel, or moisture very well, it forms a nasty gray gelatinous sludge, as you described. Uncontaminated, it does fine for us, we use XP-2. I'm not convinced it is all that fast, and I've never had bearing problems with other oils, so I can't say the Joe Gibbs is doing any better.

Insiders with NASCAR teams tell me the Joe Gibbs oil does not get along with some of the various coatings, especially some of the DLC coatings. Having a DLC coating failure is catastrophic.

We saw a measurable HP loss with Valvoline 10W-30 race oil, compared to the thickest Joe Gibbs break in oil.

[Ed Wright]

I saw zero advantage to the Gibbs oil, never had bearing problems with anything else anyway. Did not like the sludge in the pan and oil filter, nor the loss of coating on the piston skirts. Some people love it. Had zero issues with RP, and "Race9" is the fastest I've found, so have changed back to RP 5 W 20 & the 009 for heads-ups. With no sludge, no wear, and fastest I have found, I see no reason to change. What is another oil going to do better?
Actually had zero problems with Mobile1 with Comp Cams break in additive added.

[njk53]

We also use Mobil 1 with the Comp Cams break in additive with no sludge or wear issues.

[gsa612]

Originally Posted by Bob Gullett

I used to use the Joe Gibbs XP-1 5-20. Never again. Extreme sludge created by this oil pluging oil filters. Just about cost me an engine. Now I use 10-30 Valvoline race oil. No issues and runs clean.

Bob, same here when our friend (rip) ran the JG xp2 he would use it for class then drain it. I had some with 3 runs on it poured it into the motor left a lot of sludge at the bottom of the jug. gsa612

[Ed Wright]

I've been told that sludge is part of the oil that just "fell out of suspension". Not really sludge. (It is very slippery) And that it "mixes back up when running".

Don't care, don't want it in the bottom of my pan.

I still break mine in with BR30, but drain it right after running it. Don't allow it to sit and seperate, if the BR30 even does that. Have not tried to find out if it does.