[DeTomaso] A presentation on race oil basics from Joe Biggs Oil

[asajay at asajay.com]

What about Amsoil?

Asa Jay

Quoting Daniel C Jones <daniel.c.jones2 at gmail.com>:

>> Dan J or someone:  Are synthetics recommended for flat tappets?  Do we
>> know what the zinc content might be?
>
> Yes but only if they have at least 1200 PPM zinc (ZDDP).  Passenger car
> motor oils had approximately 1200 ppm zinc prior to 2001.  In 2001, the zinc
> was reduced to 1000 ppm and in 2005 reduced again to the current 800 ppm.
> Diesel oils like Shell Rotella T with the CI-4 rating had 1400+ PPM (some
> as high as 1600).  You can only get Rotella T 15W-40 CI-4 in 55 gallon
> drums now but CJ-4 version that's available in quart bottles is 1200 PPM
> so still should be safe for flat tappets. Likewise, Mobil has Delvac 1
> along with several other oils with 1200+ PPM:
>
>  http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf
>
> Something like Mobil 1 Extended Life or Turbo Diesel oil would be good
> for flat tappet cams.  Kendall Super-D 3 Diesel Engine Oil supposedly has
> 1450 PPM:
>
> http://www.kendallmotoroil.com/NR/rdonlyres/CD5DE04F-2A0A-4AA4-86A3-798E3AD7D4C6/0/K_SD3_Dsl_Multi.pdf
>
> Chevron Delo is another that would likely work, along with motorcylcle oils
> like Mobil MX4T.  A number of guys are using Valvoline VR1 but beware there
> are a couple of versions of VR1, one of which is not suitable.  You need to
> be very careful with racing oils as some do not have the additive packages
> required for a daily driver application and/or require more frequent change
> intervals (some need to be changed every 500 miles).
>
> Whatever you choose, stay away from the ILSAC GF-4 specification oils as
> the phosphorus (zinc) levels for those oils must be less than 800 ppm.
>
> Dan Jones
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