race oil

[mike kittrell]

with all the changes to motor oil what is the best oil for a dirt late model
engine thanks mk

[needforspeed66gt]

I always use Kendall GT-1

[Twystd1]

Brad Penn and a bottle of GM EOS.

Clayton

[CNC BLOCKS]

I always use Kendall GT-1

Yhats not the original Kendall GT-1 oil as the better oil is the original green oil made by Brad-penn http://www.bradpennracing.com/

[#84Dave]

Running bearing clearances of .0025-.00275 in our Chev V-8 Super Late Model paved-oval engine, we've had great success with a 50-50 mix of Valvoline Racing 30-weight and 20W-50. Along with 2 bottles (1 quart) of GM EOS in our 12-quart dry-sump system. Others in our series also run the Brad Penn oil with good success. The GM EOS has 9000 ppm of zinc, one of nature's best anti-wear products. I personally won't put an endurance race engine on a track without the EOS added to the oil.
Dave

[needforspeed66gt]

I always use Kendall GT-1

Yhats not the original Kendall GT-1 oil as the better oil is the original green oil made by Brad-penn http://www.bradpennracing.com/

When did it change? I am on my last case, and it still pours green...

[Wolfplace]

I always use Kendall GT-1

Yhats not the original Kendall GT-1 oil as the better oil is the original green oil made by Brad-penn http://www.bradpennracing.com/

When did it change? I am on my last case, and it still pours green...

About 10 years ago

[needforspeed66gt]

About 10 years ago

wow - glad I found out now, I was going to order a bunch more cases this week.

[racer189]

Should a person consider adding EOS to synthetic oil (Joe Gibbs) in a marine endurance application.

[TSTOM]

Brad Penn here too.... and by the way....it's still green

[#84Dave]

Racer189...... if the Gibbs oil has less than about 1200-1400 ppm of zinc, I'd add EOS to bring the zinc up. Most decent racing oils will have at least 1200 ppm of zinc. At least the mineral oils. I'm not a synthetic expert, so I don't know if they substitute some other additive package for anti-wear properties in synthetics. But zinc is the anti-wear substance of choice in mineral oils. Since the government told the refineries/blenders to cut the zinc down for normal highway use oils, some oils are down to 600-880 ppm. I also don't know if the government mandated any zinc removal from pure racing oils. They may have left them alone. But EOS is cheap insurance @ ~$6 a bottle so I use it. I use it in all my race engines, even using racing mineral oil, and I dump a bottle in my personal vehicles at every oil change. I'll change the catalytic converter if it goes south, rather than take a chance on excessive engine wear. I can buy quite a few cat's for the price of replacing the engine in my S-10 Chev! Dave

[mike kittrell]

thanks

[Ron Golden]

Guys,
It seems most of the engine builders are concerned with the governments requirement that the zinc and phosphorus levels in engine oils continue to be lowered to protect catalic converters. Unknown to most of us this lowering started in 1996 and doesn't seem to have bottomed out.

Lately I've talked to the engineering departments at Red Line, Mobil 1 and Royal Purple about the amount of zinc and phosphorus in their racing oils. From what I could gleen from the conversations Mobil 1 has just over 1000 ppm of zinc and phosphorus, Royal Purple wouldn't tell me how much their oils contained and Red Line said their oils contained 2400 ppm of zinc and 2500 ppm of phosphorus.

According to the tech person at Red Line the normal mineral based oils we buy at O'Reillys, Advance Auto, etc. are now in the 400 ppm range.

It would seem flat tappet cams are destined to become a thing of the past even though some roundy-round classes still require them in an attempt to keep costs down. A lot of the owners of street driven cars still want to use flat tappet cams for the same reason since they aren't aware of the situation.

Although no final decision has been made it looks like Red Line racing oil is on the top of our list. I'll keep talking to the oil companies before a final decision is made.

Ron

[racer189]

I don't know how much Zinc Joe Gibbs Synthetic has. I heard that it was one of the best racing oils available. There probably won't be a problem but I'm a little nervous about adding EOS to synthetic oil in a $35,000+ engine without knowing it will be ok for sure.

[TheEngineWorks.com]

I use Rotella T, it still has 1500ppm of zinc and a very good anti-ware package due to it being for extreme use (diesel)..