You can substitute Lucas 15W-40 with any high-quality diesel engine oil that meets or exceeds the API CI-4, CJ-4, or CK-4 specifications. Common alternatives include Shell Rotella T4 15W-40 or Mobil Delvac 15W-40. Additionally, you could use other multi-viscosity oils like 10W-30 or 20W-50, depending on the temperature range and manufacturer's recommendations for your specific engine. Always ensure that the substitute oil is compatible with your engine's requirements.
15W40
Yes, you can mix conventional oil with synthetic oil with no problem.
It takes 15 quarts of 15W40 diesel oil I highly recommend Rotella 15W40
Only the weight of the oil, 20w 40 is thiker than the 15w40, 20w 40 is the best oil for the old cars although 15w40 is very easier cold start ...
15w40
15w40(CH4)
15W40
15w40
10W40 or 15W40
12 quarts of 15w4012 quarts of 15w40
15w40
rotella t 15w40