Lucas Oil 10631 SAE 30 Racing Engine Break-in Oil - 5 Quart

Lucas Oil’s SAE 30 break-in oil is excellent quality and does exactly what it’s meant to. It’s thick, high-zinc oil that provides outstanding protection during the first few hours of running a new or rebuilt engine. The formula helps parts seat properly without excessive wear and keeps everything lubricated even under high friction and heat. It pours smoothly and has a clean, professional-grade consistency. After using it, the engine ran quietly and strong with no metal shavings in the oil, showing it did its job perfectly. It’s one of the best options for small engines, go-karts, and performance builds. Five stars for protection, reliability, and proven results.

I rebuilt my classic car engine and wanted a break-in oil so I got this in the 5 quart size, unfortunately I had a high pressure line fail and lost some of the original oil, this quart was to bring the level back full. I will advise as to its effectiveness when finished with the break-in period, it does lose viscosity when hot thought.

Great break in oil for new motor

Good product! Higher zinc for engine breakin

Why did you pick this product vs others?: Excellent break-in oil perfect for new engines or rebuilds, offering great lubrication and protection for critical components during the initial run-in period. It prevents viscosity breakdown and aids in properly seating rings. The convenient 3-pack sizing is a plus, suitable for motorcycle, small engine, or classic car break-ins. A top choice for ensuring a smooth start for your engine. Will certainly purchase again.

Used this oil to break in my 408 stroker and had no issues. Will be using again next time I need to break a new engine in.

Worked

Bought 15qt to use on my engine rebuild on a 2003 dodge 4.7. Prefilled all passages with a syringe and soaked valve train and timing chains in this overnight. Ran engine for 10 miles for initial break-in, then changed to this oil again for 600 miles, then went back to my 5w40 synthetic. No leaks, no smoke, and good oil pressure. Engine felt stronger by about 100 miles in, which means the steel moly and ductile iron rings bit the cross hatch properly but not excessively. It was assembled meticulously, but this oil played no small part. Would buy again but if using in summer like I did, I would maybe do the 40w instead (got a little timing chain rattle at hot idle with the 30w that disappeared with the 5w40 synthetic).

I plan to use this oil in our craftsman 21hp lawn tractor.I rebuilt the engine a few years ago but it hasn’t had much usage since then.

great oil

Great oil .

Thanks works as it should

OK