I am about to fire the rebuilt 255 flathead. I have the Lucas zinc additive, any recommendations on the best non detergent oil for breaking it in?

JB

 

I use Royal Purple...here is their pitch:


Engine builders have grown increasingly concerned that many modern motor oils do not provide adequate wear protection for new engines, particularly those using flat-tappet cams. Royal Purple has addressed this issue by developing a new engine break-in oil that promotes a gentle start-up and gives you superior protection from rough-running engine problems.
Royal Purple combines highly refined mineral oil, preferred for engine break-in, with advanced additives containing high levels of zinc and phosphorus to optimize protection in flat-tappet and roller engines.
Royal Purple Break-in Oil is formulated to allow optimal ring seal and protect rotating assembly components such as the camshaft and valve train from initial start-up wear. Its high film strength provides engine protection superior to full synthetic oils that are not engineered specifically for new engines. Perfect for your new factory-ordered vehicle and engine rebuilds, Royal Purple Break-In Oil is fully formulated and does not require the use of any other chemical additives. After the engine is broken in, we recommend using the right Royal Purple high performance synthetic engine oil for your vehicle.

 

Why do you want to use non-detergent oil?

 

I really like the Lucas Hot Rod and Classic with HIGH ZINC

 

Thanks guys, will look into those and see which one is on amazon prime.

JB

 

John Deere offers a break-in 30 wt motor oil. I have used it in the past breaking in freshly rebuilt engines. The Lucas stuff is mainly a marketing product, and it along with other oil additives should be avoided as it upsets the balance of additives.

Also why do you want to use a non-detergent oil as they went the way of the dodo bird and should only be used in air compressors.

 

When I got the rebuilt engine for Edith I used the Lucas break in oil.
https://www.summitracing.com/parts/l...msvRoC5Rnw_wcB

 

And yes Amazon does sell it too. But quite a bit more $$ than Summit.