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Flat Tappets
Using Synthetic Oil in Flat Tappet Engines
I am the original owner of a 1971 Oldsmobile 442 W30. I recently completed a complete frame off restoration. The engine (455 cid) was remanufactured by Jasper Engines in their authentic program. I hav...
The Mobil 1™ formulation we offer in a 10W-40 viscosity grade is our High Mileage product. Since your engine has just been rebuilt, this may not be the right selection for you. For your Oldsmobile, we...
Oil for a Modified 70’s Camaro
Everyone seems to have an opinion and your chart does not go back to 1970. I just bought a 1970 Camaro highly modified 400 Chevy small block. The owner before me used synthetic but bought what was on ...
For your Camaro, we would recommend Mobil 1™ 15W-50 synthetic motor oil.  Mobil 1 15W-50 is a higher viscosity synthetic oil that delivers a thick oil film for protection of high performance engines. ...
ZDDP Levels of Mobil Delvac
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...
Using Synthetic Oil with Non Roller Bearing Type Tappets
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...
Does Mobil 1 Contain the Additive for Flat Tappet Cams?
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...
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