Updates afteer talking to my Oil Chemist rcently acquired friend/vendor
Chevron Rpm Dello 400 Low Emmissions has had zinc removed mostly.
Shell Rotella T LE has had most zincs removed.
Shell Rotella T HD is still good to go with what we need in zinc additives
Chevron RPM Dello 400 Multi-Grade is good to go and has additives we need such as the zinc in original content.
Boy that can get mis-leading.
For us stuck in the dark ages still insisting on Fossil Fuel Oil Crudes;
Use only viscosities of 15-40 or 15w-40
The W is not weight. W stands ofr winter lubrication qualities.
Napa has a Napa Oil also with the good stuff. It is not passanger car oil it is Commercial Diesel Truck grade oil. Stay away from the AutoZone Coastal Diesel Oils.
In all oils used for racing and performance look for this;
A funny looking donut shape on the container.
IN the center look for CI-4-SL api
Around the outer edge of the donut shape look for;
CG-4-SH
or
CH-4-SJ
That donut looking shape should be on allo oils but will be for sure on Commercial Grade Oils that are 15-40 oils.
Ed