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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Aug 2013 Posts: 293 'Bolter | | 'Bolter Joined: Aug 2013 Posts: 293 | Shell Rotella 15W40 T4 in my Cummins year round and also in my 216, seems to be near perfect for my application and only around $70 for 20 litres or just over 5 gallons for our friends to the south! | | | | | Joined: Dec 2000 Posts: 506 Shop Shark | | Shop Shark Joined: Dec 2000 Posts: 506 | Amsoil makes a 10w40 Signature oil that has 1265 ppm of Phosphorus and 1378 ppm of of Zink. Amsoil also has a break in oil with very high levels to provide cam lobe protection. Use that. When you feel the rings have seated, 1500-2000 miles. Then put in the Amsoil 10w40, worked for me in my 1959 235 engine.
"Drugs are money, money is power, power is security." - Kent Heiner
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Carbon footprint family of 2/11 tonnes of CO2/yr
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | There is no problem using high-ZDDP/Zinc oil on any stovebolt engine (I think).
However, it is not needed on stovebolt engines 216/235/261 after break-in.
I use a high ZDDP break-in-in oil on my newly rebuilt stovebolt engines.
After break-in, I use the Shell Rotella 10w40 or 15w40 after that (whichever is cheaper).
Are we heading into another round of discussion of ZDDP-necessity in stovebolt engines? | | |
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