What's up with Comp Cams ?
Comp Cams makes excellent products overall with an occasional exception. I would buy a Comp Cam again. My 99 TA & 72 vette have Comp Cams.
Back in 2002 we checked my custom Comp Cams 224/224 XE-R cam with a cam doctor. It was almost perfect on the money spec wise. It was installed along with the TEA heads and other parts in my 99 TA with 32,xxx miles.
Today the 99 TA has 153, xxx miles and the same XE-R cam. I think 120,000+ miles is pretty respectable for an XE-R cam. The TA still runs fine and I'm accustomed to the sewing machine sounding valve train after 14 years.
Mobile 1 5w-30 winter & Mobile 1 10w-30 for the other seasons.
ZDDP is just ONE of several anti-ware technologies for oil. The zinc in ZDDP only comes into play as a last ditch defense when metal to metal contact is occuring - in other words the oil film has already failed. That's my understanding based on what I've read.
I don't believe high levels of ZDDP matter very much for long cam life based on my XE-R experience and using the lower/medium level ZDDP Mobile 1 oils over the last 14 years.
Back in 2002 we checked my custom Comp Cams 224/224 XE-R cam with a cam doctor. It was almost perfect on the money spec wise. It was installed along with the TEA heads and other parts in my 99 TA with 32,xxx miles.
Today the 99 TA has 153, xxx miles and the same XE-R cam. I think 120,000+ miles is pretty respectable for an XE-R cam. The TA still runs fine and I'm accustomed to the sewing machine sounding valve train after 14 years.
Mobile 1 5w-30 winter & Mobile 1 10w-30 for the other seasons.
ZDDP is just ONE of several anti-ware technologies for oil. The zinc in ZDDP only comes into play as a last ditch defense when metal to metal contact is occuring - in other words the oil film has already failed. That's my understanding based on what I've read.
I don't believe high levels of ZDDP matter very much for long cam life based on my XE-R experience and using the lower/medium level ZDDP Mobile 1 oils over the last 14 years.
What Comp did with the cores makes that whole ZDDP thing moot anyway. You don't have to run super high zinc with stock cams. And it was definitely an engineering issue they resolved. The zinc was a crappy bandaid for the real issue.
Adding Zinc additives to oil is like trying to mix water and oil I have learned. Unless it is done at the refinery it is not going to mix with the oil. Also there are about 50 different ways to produce a zinc additive. This info all come from the guys at Driven Oil.
Interesting....can you give any more detail about this? Specifically, how is it that the zinc additive will/will not mix with oil? If true, it makes zinc additives useless, but I don't understand why they wouldn't mix.
EOS= No for long engine life WE run LS/Gen-7 BBC engines for 25K hours before rebuild is required@1800 RPM.
I have found problems with EOS causing wear on oil pumps, rings, and timing chains.
SURE, hi load race engines may benefit from the use of EOS when components are replaced often after a short term.
MY "Comp" personal experience found broken valve springs, broken HYD roller lifter "tie-bar's" in RHS block use, VERY poor warranty service (not given).
The opinion of many professional racers (NASCAR, etc.) is not to use their products, just run their stickers.
Lance
I have found problems with EOS causing wear on oil pumps, rings, and timing chains.
SURE, hi load race engines may benefit from the use of EOS when components are replaced often after a short term.
MY "Comp" personal experience found broken valve springs, broken HYD roller lifter "tie-bar's" in RHS block use, VERY poor warranty service (not given).
The opinion of many professional racers (NASCAR, etc.) is not to use their products, just run their stickers.
Lance
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