diesel oil users in gas cars please read

[built]

It has been determined in the SAE paper "Oil Development for Nascar" that overly detergent motor oils can block or "clean" the anti-wear films off of engine parts. Since low detergent packages increase the effectiveness of film formation, racing oils tend to have less agressive detergent packages, which is another reason maybe to consider a racing oil versus a diesel oil for your engine.
With the cutbacks in zink and additives in common car oils we are going to Rottela T and other diesel oils for the additives that have been cut back also but are still higher than gas auto oils.
So Us guys who are thinking that we are doing our classic cars good by using deisel oils may be doing more harm than good.

 

[55Test]

Perhaps, if we all had racing engines..

 

[jaredyost]

Some low detergent oils with a decent level of zinc are some of the european oils. Some of the one's I've looked up that meet BMW LL specs have some good level of zinc in them.

 

[built]

The thing is nextel cars use flat tappet lifters like those of us who still use them and want to protect our cams etc..
you can visit Gow gibbs racing site and learn more of what he says, lake speed also said in a seminar that "any store like walmart will not have the oils we need with enough zinc for protection of our engines on the street or track "
http://www.joegibbsracingoil.com/

 

[wadedog]

I'm getting really tired of all the confusion on what oil to use for flat tappet engines,It's near impossible to find the old CI oils and now the thought of using deisel oils that have a decent amount of zinc might have too much detergent and wipe all the protection of the surface of the metal we are trying to protect.
Untill a maker fianlly comes up with a special oil for us older engine guys ,I wonder now if the valvoline "not street legal" oils have more than the new gov standards.
Also how about the 4stroke bike or marine oils, they don't have to meet that standard YET.
Maybe we should be looking more towards those oils for protection?

 

[Steve S]

Originally Posted By: built
It has been determined in the SAE paper "Oil Development for Nascar" that overly detergent motor oils can block or "clean" the anti-wear films off of engine parts. Since low detergent packages increase the effectiveness of film formation, racing oils tend to have less agressive detergent packages, which is another reason maybe to consider a racing oil versus a diesel oil for your engine.
With the cutbacks in zink and additives in common car oils we are going to Rottela T and other diesel oils for the additives that have been cut back also but are still higher than gas auto oils.
So Us guys who are thinking that we are doing our classic cars good by using deisel oils may be doing more harm than good.
Read an article not really understanding what we are reading about is not always best,

 

[Gregory]

Would a UOA back up an oils lake of protection?

 

[Squishy]

I've been under the belief that racing oils focused on anti-wear additives instead of detergency mainly due to the fact that the engines generally get torn down and rebuilt way more often than an equivalent 3000 mile OCI. Thus there isn't really enough time for a large amount of contaminants to build up.

 

[dwendt44]

What Squishy said.
Oil in race engines is often changed at 500 miles, if not less.

 

[Dyoel182]

Originally Posted By: built
It has been determined in the SAE paper "Oil Development for Nascar" that overly detergent motor oils can block or "clean" the anti-wear films off of engine parts. Since low detergent packages increase the effectiveness of film formation, racing oils tend to have less agressive detergent packages, which is another reason maybe to consider a racing oil versus a diesel oil for your engine.


I wish my engine had anti-wear film on it. Seriously though, I have no idea why a racing oil would increase a lasting film or even what qualifies as a "racing" oil.

 

[virginoil]

Originally Posted By: Dyoel182
Originally Posted By: built
It has been determined in the SAE paper "Oil Development for Nascar" that overly detergent motor oils can block or "clean" the anti-wear films off of engine parts. Since low detergent packages increase the effectiveness of film formation, racing oils tend to have less agressive detergent packages, which is another reason maybe to consider a racing oil versus a diesel oil for your engine.


I wish my engine had anti-wear film on it. ,,,,,,,,.


Is this a possible reason as to why Redline Oils show high wear for some soft metals in their street engine oil as they are formulated with too high detergency ?

 

[Gary Allan]

Originally Posted By: dwendt44
What Squishy said.
Oil in race engines is often changed at 500 miles, if not less.


While agree that racing oil is for racing. The 500 mile interval may have something more to do with 500 mile races or racing for 500 miles. 500% output of a passenger car engine might alter the fatigue rate a bit.

Again, I agree that it's not something to do without some thought put into it.

 

[OilGuy]

Originally Posted By: Steve S
Originally Posted By: built
It has been determined in the SAE paper "Oil Development for Nascar" that overly detergent motor oils can block or "clean" the anti-wear films off of engine parts.
Read an article not really understanding what we are reading about is not always best,


A little knowledge can be dangerous.

 

[JAG]

It is well established that detergents and dispersants generally get in the way of anti-wear additives making thick and robust anti-wear films. They are surface-active molecules.

 

[buster]

Originally Posted By: JAG
It is well established that detergents and dispersants generally get in the way of anti-wear additives making thick and robust anti-wear films. They are surface-active molecules.


Right, and this is why I believe we often see eleveate wear metals with certain synthetics. I believe it's trade off for better sludge/deposit control for a few ppm of wear. Just a thought.

 

[Cyprs]

I am a layman in oil, I can only rationalize with some comon logic and then choose my personal choice in oil for what is best for my personal choice in my gassers.

When I put a group IV POA SYN 0-30 HDEO with a 12.2 TBN and high 12 Visc. rating at 100C, I have to believe my engine is not only squeaky clean, but there is NO lacking of lubrication or oil film with such a powerful add pack along with such a heavy filming oil.

Bit off topic, I chuckle at "HIGH MILEAGE" SL conventional oils sold for nearly the same price as my choice in a Group 1V POA syn HEDO oil, I see $18.00 4 litre High Mileage SL oils, $5.00 per liter for my HDEO SYN oil in bulk pricing. For the little difference in price and considering the oil is going into an old engine,I see full justification for good quality low priced synthectic HDEOs in gas engines for protection old or new, why not? (it is the bulk diesel HDEO market that makes these HDEOs such a great choice in protection at the great bulk price point iwth max protection)

I sleep at night with my XD3 0-30 in my 40K X-trail and my old 200+k Nissan. I believe it serves both my purposes in new and old engines perfectly, the new Nissans love heavy oil, so do the old ones. I believe there is oil film on my gas engine parts.
This is my personal belief and I sleep at night with my personal HDEO choices for my gassers new or old.

Cyprs

 

[99]

Originally Posted By: built
It has been determined in the SAE paper "Oil Development for Nascar" that overly detergent motor oils can block or "clean" the anti-wear films off of engine parts. Since low detergent packages increase the effectiveness of film formation, racing oils tend to have less agressive detergent packages, which is another reason maybe to consider a racing oil versus a diesel oil for your engine.
With the cutbacks in zink and additives in common car oils we are going to Rottela T and other diesel oils for the additives that have been cut back also but are still higher than gas auto oils.
So Us guys who are thinking that we are doing our classic cars good by using deisel oils may be doing more harm than good.
That's all [censored] unless you are dealing exclusively with a Nascar spec engine. With that said, use the Rotella T or whatever other HDEO in your hot rod without worry.