What are the current ZDDP levels for Mobil Delvac 15W-40? Is it recommended for classic engines with flat tappet camshafts?
Mobil Delvac 1300 Super 15W-40, which meets API CJ-4 performance standards, has a Phosphorus limit of 0.12 wt%. With respect to your question on slider tappets, Mobil Delvac 1300 Super 15W-40 meets C...
I've been advised to not use any synthetic oil for my rebuilt '64 T-Bird's 390 engine because the tappets are not roller-bearing types. It doesn't seem right with all your higher specs. Can I?
There have been some concerns voiced by bloggers that the new GF-5 oils which have a reduced ZDDP level to protect catalytic converters have caused problems in high performance race engines with slidi...
I build a few engines a year as I do muscle car repairs and I have been having a lot of camshaft failures. I just read that it is because the oil no longer has the additive for flat tappet cams. Can ...
For older, flat tappet engines where wear may be more of a concern, we offer a number of synthetic oils which are higher in phosphorus than API SN/ILSAC GF-5 oils. These include Mobil 1 15W-50 (1,200...
