High zinc oils
Advanced
Joined: Nov 2006
Posts: 90
Likes: 1
From: New Paris Indiana
I use rotella T 15 w 40 but heard they are dropping a lot of zinc out of it now. I'm considering mobil 1 v-twin oil now, It's the highest zinc content I can find. Could also just dump some comp cams break in additive to any oil you please.
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
I've been using Valvoline VRI 10w30 lately. My engine was rebuilt about 2 years ago with a bit tighter tolerances so I need the oil to be a bit thinner. VRI has a good amount of zinc in it.
Royal purple is another option, but it's like $9 a quart!
Royal purple is another option, but it's like $9 a quart!
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Whats considered a high amount of Zinc and how much is to low??
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
Sure is, it's like around $50 - $60 for a box of it. Basically half the price of RP. I've been running it for the past 4 or 5 months and it seems to be holding up pretty well. Having my rear main seal replaced today so I'll find out how well it's doing its job later.
Melting Slicks
Joined: Jul 2004
Posts: 2,867
Likes: 195
From: Maryland
API SM oil is phosphorus (anti wear component of ZDDP) limited to 800 parts/ million and lower viscosity "Energy Saving " SM is even less. The richest ZDDP additive package is found in API rated CI-4 . CI-4 depending on the vendor has between 1000 to 1500 parts/ million ZDDP. API CJ-4 is the newer diesel rated oil has a little less ZDDP ( up to 1200 parts/million ZDDP) Since there are still many high sulfur diesel fuel engines in use the richer ZDDP package is NOT going away anytime soon and should be available for at least 5 years. Any brand CI-4 and the appropriate viscosity should be the prime selection of oil for flat tappet engines.
Last edited by Donald #31176; Aug 24, 2007 at 05:45 PM.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
API SM oil is phosphorus (anti wear component of ZDDP) limited to 800 parts/ million and lower viscosity "Energy Saving " SM is even less. The richest ZDDP additive package is found in API rated CI-4 . CI-4 depending on the vendor has between 1000 to 1500 parts/ million ZDDP. API CJ-4 is the newer diesel rated oil has a little less ZDDP ( up to 1200 parts/million ZDDP) Since there are still many high sulfur diesel engines in use the richer ZDDP package is NOT going away anytime soon and should be available for at least 5 years. Any brand CI-4 and the appropriate viscosity should be the prime selection of oil for flat tappet engines.
but JustinD has some Castrol GTX oil and I don't believe he
knows if it has much zinc in it if any. Sounds like any of the newer
diesel oil would still be good or the VR1 valvoline.
Last edited by Little Mouse; Aug 24, 2007 at 04:09 PM.
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
Diesel oil is probably fine if your engine has a lot of miles or has forged pistons, but if your engine is relatively fresh 15w40 is pretty thick stuff and I don't think it'd properly lubricate the tight areas. Hence why I'm running 10w30. I prefer 5w30 or 10w30 over any of that heavy oil as my engine RARELY gets over 180 degrees and I need that cold lubrication. I can see the need for it if your engine is revving hard for long periods of time, though...
So I shall be sticking with the VR1 since it has plenty of zinc and actually comes in a light multi-viscosity.
So I shall be sticking with the VR1 since it has plenty of zinc and actually comes in a light multi-viscosity.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
It seems that castrol gtx has .12 zinc. Whatever that means. I also read that valvoline race is .20.
http://www.fjfan.com/technical/motoroil-faq.htm
http://www.fjfan.com/technical/motoroil-faq.htm
Last edited by JustinD; Aug 24, 2007 at 04:36 PM.
Melting Slicks
Joined: Jul 2004
Posts: 2,867
Likes: 195
From: Maryland
What is the current API rating Of Castrol GTX? The above report is for API SG/CD rated oil. API SG/CD rating is at least 6 years old .
Last edited by Donald #31176; Aug 24, 2007 at 05:42 PM.
