does this apply to us?

Crower does not recommend the use of synthetic motor oils in any racing applications, particularly hydraulic and flat tappet camshafts. The minimum gains in horsepower are offset by the excessive wear to cam and lifter surfaces. Crower recommends Kendall GT-1 (20W50) Petroleum based motor oil in all high performance applications. If your manual suggests running synthetic oil, then do so. We have found, however, that the benefits do not outweigh the costs. For additional information click here!

more info here>>http://www.atis.net/oil_faq.html

what are your thoughts on this?

 

It is a combination of stiff valve springs and modern oils that have less ZDDP anti wear additives that create the problem. You can run synt if you add 1/2 bottle GM eos available at your local Chevy dealer for about $8. The greenies think that ZDDP will shorten the life of your cat. Dan

 

anyone else want to add?

 

My mechanic told me to use Shell 10w40 Diesel oil in my Type R, what is your input on this ( normal Type R cams ).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by No-Tec &raquo;</TD></TR><TR><TD CLASS="quote">does this apply to us?

Crower does not recommend the use of synthetic motor oils in any racing applications, particularly hydraulic and flat tappet camshafts. The minimum gains in horsepower are offset by the excessive wear to cam and lifter surfaces. Crower recommends Kendall GT-1 (20W50) Petroleum based motor oil in all high performance applications. If your manual suggests running synthetic oil, then do so. We have found, however, that the benefits do not outweigh the costs. For additional information click here!

more info here&gt;&gt;http://www.atis.net/oil_faq.html


what are your thoughts on this? </TD></TR></TABLE>

Sounds like a bunch of old farts who don't like those 'newfangled' synthetic oils. I would run synth. It is just SO superior to conventional oil in EVERY way. It can't possibly be coincidence that every car I have run conventionl oil in has eventually blown up on me, while every car that I have run synth in takes a licking and keeps on ticking. I think that the link you gave says it all in one short paragraph:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">The synthetics offer the only truly significant differences, due to their superior high temperature oxidation resistance, high film strength, very low tendency to form deposits, stable viscosity base, and low temperature flow characteristics. Synthetics are superior lubricants compared to traditional petroleum oils. You will have to decide if their high cost is justified in your application.</TD></TR></TABLE>

 

Bunch of crap right there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Teamdiesel &raquo;</TD></TR><TR><TD CLASS="quote">My mechanic told me to use Shell 10w40 Diesel oil in my Type R, what is your input on this ( normal Type R cams ).</TD></TR></TABLE> This is also correct diesel's don't have a cat so the greenies have left alone diesel oil it still has a lot of zddp in it. Mobil 1 truck and suv 5-40 is a good choice or shell rotella 5-40 synth available at wall mart for about $13 a gallon. The problem with HDEO (heavy duty engine oil) is it is hard to find the thinner stuff like 5-30/10-30 it is up in Canada where it is colder. I like running a mix of 3 quarts 10-30 and 2 of 15-40 HDEO. Dan

 

One more thing. If there is an additive that helps reduce wear that the environmentalists are trying to get out of oil, why would they target synth but let it slide in dino? That just doesn't make sense.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by No-Tec &raquo;</TD></TR><TR><TD CLASS="quote">The minimum gains in horsepower are offset by the excessive wear to cam and lifter surfaces. </TD></TR></TABLE>

Here's something else that doesn't make sense. A lubricant that increases HP does so because it decreases friction. And reducing friction by definition decreases wear. Remember that friction is caused when surface irregularities interlock and then shear each other off when there is movement. So friction and wear go hand in hand.

 

They are targeting both dino and synth. Crower's oil choice is a heavy 20-50 racing oil that has the older API specs with more anti wear. The base oil wether it is synth or dino is not as important as the additive package for fighting engine wear. I agree with crower to some extent but there is some flaws in there recommendation synth is not the problem additive packages are. I recommend going to bob is the oil guy forum lots of very good stuff and knowledgeable folks over there. Webcam also has a no synth but racing oil recommendation. They see a lot more worn cams than us and we are not in the cam shaft biz. <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote">

Here's something else that doesn't make sense. A lubricant that increases HP does so because it decreases friction. And reducing friction by definition decreases wear. Remember that friction is caused when surface irregularities interlock and then shear each other off when there is movement. So friction and wear go hand in hand.</TD></TR></TABLE>
No it is not that simple low friction and wear are not always tied together ZDDP is a high coefficient of friction but a low wear and moly lubes are both low in friction and wear. Dan

Dan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dan Ruddock &raquo;</TD></TR><TR><TD CLASS="quote">They are targeting both dino and synth. Crower's oil choice is a heavy 20-50 racing oil that has the older API specs with more anti wear. The base oil wether it is synth or dino is not as important as the additive package for fighting engine wear. I agree with crower to some extent but there is some flaws in there recommendation synth is not the problem additive packages are. I recommend going to bob is the oil guy forum lots of very good stuff and knowledgeable folks over there. Webcam also has a no synth but racing oil recommendation. They see a lot more worn cams than us and we are not in the cam shaft biz.
No it is not that simple low friction and wear are not always tied together ZDDP is a high coefficient of friction but a low wear and moly lubes are both low in friction and wear. Dan

Dan</TD></TR></TABLE>

So why not use a synth that is high in ZDDP? I believe Amsoil makes such an oil.

 

Amsoil is a great choice and like I said Mobil 1 truck & suv or Shell rotella 5-40 are also very good choices. Dan

 

yeah i didnt think that shell rotella was a true synthetic though

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JCushing &raquo;</TD></TR><TR><TD CLASS="quote">yeah i didnt think that shell rotella was a true synthetic though</TD></TR></TABLE> You are correct, but it is still is a very good oil for it's price. Dan

 

Very interesting stuff. I did a web search on "GM EOS", which generated more than 10 pages of links. All of the links seem to express the same information in more or less detail. This link seemed to be the most concise: http://www.revsearch.com/dynam....html