For those really concerned about this, I'd still recommend Chevron Delo 400 LE. I use the 15w-40 grade. This is an industrial/commercial grade oil formulated to keep fleet vehicles going for years. I started using it when it was recommended to me by Crane Cams when replacing a cam with a couple bad lobes in a 283 in a '64 Nova. A local auto parts dealer (and racer) that I used to buy parts from had previously recommended Delo gear oil for trans and differential use. In his Henry J drag car, he was seeing a 20 degree drop in oil temp in his diff over the next best he could find, indicating significantly less friction.
For those into the numbers, Zn is .13% or 1300ppm. Here's Chevron's data sheets for the oil line: https://www.cbest.chevron.com/msdsServer/controller?module=com.chevron.lubes .msds.bus.BusPDSList®ion=NA&txtPDSNumber=DELO&directPDSLink=TRUE&isLoginP age=true&lbLanguage=e 12th one down the page is what I'm using. Joe -----Original Message----- ---------------------------------------------------------------------------------------------------------------- Where Speed & Service Have Always Mattered @ http://www.ados.net From: [EMAIL PROTECTED] Sent: Wednesday, April 23, 2008 11:32 AM To: [EMAIL PROTECTED]; [email protected] Subject: [Spits] FYI Castrol Oil This was forwarded to me from someone on the MG list Sorry if it's a rerun and I missed it! Walt TR3, TR6, Spit, 95 Exploder -------- Original Message -------- Subject: RE: CastrolUSA - Expert Advice Form Data Date: Mon, 21 Apr 2008 14:22:20 -0400 From: Castrol <[EMAIL PROTECTED]> *Thank you for contacting Castrol,* * * The latest API SM/ILSAC GF-4 category calls for reduced Zinc and Phosphorus levels to allow extended catalyst life in current model vehicles. There appear to be field issues associated with the SM/GF-4 oil's level of antiwear in the classic car engines known as flat tappet cam engines. The current late model passenger car engines are not flat tappet cam engines and have no reported field issues related to the level of antiwear chemistry in the SM/GF-4 oils. **_Product Recommendations for Flat Tappet (Solid Lifter) Cam Engines:_** Castrol Syntec 5W-40 (min Zn = 0.10 wt % = 1000 ppm)(full synthetic) Castrol Syntec 20W-50 (Recent reformulation identified by "Recommended for Classic Cars" text on back label) (min Zn = 0.12 = 1200 ppm)(full synthetic) PREFERRED Castrol TWS Motorsport 10W-60 (BMW dealerships) (min Zn = 0.10 = 1000 ppm)(full synthetic) BMW Long Life 5W-30 (BMW dealerships)(min Zn = 0.095 = 950 ppm)(full synthetic) _______________________________________________ Support Team.Net http://www.team.net/donate.html [email protected] http://autox.team.net/mailman/listinfo/spitfires http://www.team.net/archive
