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Your cart is empty.Due to current government regulations, today’s oils are missing many of the critical ingredients needed for engine protection. Engine builders and performance hobbyists are being forced to add in extra protection additives in order to maintain engine safety and performance – but not anymore. ZDDP-enhanced Engine Break-In Oil from COMP Cams provides maximum engine life while also allowing it to reach its full performance potential. It does so by improving the surface mating of valve train components (especially flat tappets), rotating assembly, rod journals, piston rings, valve guides and other vital areas of the engine. This proprietary formula includes the optimum amount of critical additives ZDDP (Zinc & Phosphorus), Molybdenum, detergents and high grade base oil. The multi-viscosity, mineral-based COMP Cams Engine Break-In Oil is fully-formulated and requires no additives or supplements. In addition, the oil is fully compatible with gasoline, methanol and high octane racing fuels.
Grandnationalguy
2025-08-31 11:28:45
This is the best supplement to use when starting up a new engine.
Douglas
2025-08-14 12:46:38
Great break-in oil additive at a great price. I used this in my early 1940's Willys Jeep when we rebuilt the original flathead L134 engine. Added a bottle of this when we filled it with oil for the first time. Drove the Jeep 1,000 miles and changed the oil. I will continue to add a bottle of this break-in additive to each oil change, because it is formulated for my older engine. Great product.
Mark E Mitchell
2025-08-11 13:14:47
Worked out just fine.
Rafael Gaston
2025-07-30 16:44:55
Exactly as described, very well made product.
Matt
2025-07-16 10:01:02
I think this is a must for a newly rebuilt engine with flat tappets
Mac
2025-06-29 11:52:38
A good engine break-in lube to protect a flat tappet camshaft during break-in. Modern oils do not have the proper additives for use with flat tappet cams used on older engine designs to prevent wear during break-in or operation. Using diesel engine oils or this additive seems to be the only way to get the older style flat tappet cams to live. This additive should be used in addition to diesel engine oil during the break-in period and after the first oil change. After break-in and the first oil change the diesel engine oil should suffice.
Kent
2025-06-23 12:47:55
All my lobes are intact!
Franco Rizzo
2025-06-01 14:16:56
Awsome stuff thanks
Gerry Watson
2025-05-28 13:29:06
Very thick additive, like molasses, but it works, my cam is broke in ....... this product along with Lucas 10W30 Hot Rod oil did the trick.
JOE WALSH
2025-01-29 15:37:03
WILL BUY AGAIN
killer1963daddy
2025-01-09 17:52:34
Likes - oil additive for break in of new engine components- recommended by cam manufacture-lower shipping cost as apposed to a case of break in oilDiss-like -states on bottle not for use in vehicles with catalytic converters..-maufature suggests using for initial breaking and every oil change after
gordie french
2024-11-26 16:48:35
this is a must when a engine has had a rebuild or new internal parts added.do not use on modern fuel injected with cat in the exhaust. the zine in this will clog
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