zinc for Mobil delvac MX based on UOA (comparable with Mobil super 1300 in the US) is around 1700ppm. Not relly good for gas engines with catcon.
Mobil 1 TDT hs lower TBN because of its CJ-4 rating which means it is for diesel engines with better diesel fuel. So they dont need much TBN. But it is 2x expensive since it is synthetic and it is more expensive to produce and there are a lot of other additives. For a gas engine with a catcon, the Mobil 1 TDT is such an excellent oil. Been using it even in a 4-stroke motorcycle and after 5,000kms oil is just about the same when you first post it. Proof of its being a synthetic making it more durable even in high temp, high-revving engines.
