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I am looking to pack the CV joints on my 2001 Ford Focus that I take to track days. The joint on the car are ridiculously overbuilt so even the cheap parts store imports work just fine. The problem is, after a few events, the grease turns to one part gold liquid, two parts swamp muck. I have a...

280° is nothing for a synthetic in my experience. I have run Mobil 1 0w-20 at that temp and higher for 15+ minute stretches. However, a lot of guessing what could happen because of that is engine dependent. The huge 3" mains of a Ford 351 Windsor probably place different demands on the oil than...

Lauren, Check out the following link for a local-to-me VW run by a man named Kirk Knestis. http://it2.evaluand.com/gti/ I know Kirk and in a 20 minute DE session he got the oil in his 2.0 8v (which I assume is what you have) well over 300°. I think that whatever brand you chose, make sure it is...

I am going to be using the Amsoil 15w-40 in my 302. Sorry, no stories to tell and I hope I never will have one of any interest, to be honest. I think the best story any amateur can tell about the oil he uses in his race engine is "put it in, forget it, drain it, no problems."

I have a Pro 5.0, so I am hoping for the same improvement. I am going with 2 qts of the Amsoil ATF and the balance (.8 qts) the Amsoil ART. Not too extreme, but I figure a good starting point for what I do.

Thanks, that is exactly what I heard. My original plan was to use MTL and change it that often (about every other weekend) but I figured that there is probably a reason it gets notchy and the likelihood of that being a good thing is pretty low.

I will be using the carbon blockers that are part of the World Class spec rebuild kit. I will be happy if the gearbox lasts 10,000 miles. That is an eternity on track. Consider that there are probably 4 max RPM shifts per mile (going up or down) and that is a serious beating. I wouldn't keep...

I am in the process of rebuilding a World Class T-5 trans and since I have little desire to repeat the process, I would like some recommendations on which fluid to use. I have heard from some that GM synchromesh works well in these gearboxes, does it make a difference if mine is a Ford sourced...

While you are correct, I think that there is also more to it than that. The fuels that the drag racers use, alcohol and nitromethane, have a tendency to washdown the cylinder walls of oil very quickly. Partially this is due to the air fuel ratio that they run (on a passenger car it is 14.7:1...

Not sure what you are implying with this, but if the sheet hits the fan, I can manage. However, I would prefer not to have to. For example, if I put the car up on jackstands Friday night, drop the pan and plastigauge the rod bearings, what do I do if they are out of spec? Do I put it back...

Wouldn't it be nice to have the transcript to:

I grew up in Bergen County and went to school in Saddle River. My high school parking lot had Porsches, Jaguars, Lexus and when one kid had a birthday, his dad let him drive the Testarossa to school. Honestly, that is just the way it is there. In other countries, the idea of a high-school age...

Is there a way to determine the service life of an engine that is used in racing events before it fails and without a tear down? The reason that I ask is that I have a Focus with a DOHC Zetec that I take to track events. It has approximately 2700 on track miles on the engine and 76000 total...

Interesting that you mention this. I read a Saab owners manual that actually said something like what you are suggesting. Basically (and this is from memory, so forgive me if it isn't right in every detail, but the message is what I am trying to convey), it said 10w-30 and 5w-30 could be...

No, I was making a point. If the logic that the factory knows best for oil viscosity is true, it could be true in other cases. That is not putting words in your mouth, as I did not indicate that those were your feelings. It was an example of how the logic of factory recommendations can, in some...

The designers are working under constraints that the owner may not care so much about. They have fuel economy targets, noise levels and other items that could be less important to the owner and therefore, a change in viscosity could be warranted. Case in point. My Focus came with 5w-20. Earlier...

Thanks for posting this. I was the one who questioned the relationship between oil life and ZDDP quantity. I know that around here, the measure of oil life remaining is TBN. Does GM use that measure at all?

Clearly I should say clearances!

Hey now! They are the ones that made that jump, not me! I am just saying that their facts are right, not their conclusions!

Compare the tolerances on a Ford Modular V8 (4.6 or 5.4) versus the older pushrod design (302/351) and you should see and indication of what I think they are trying to point out.