Hey everyone,I was given a case of 10w40 motor oil for free and was wondering if I could use this in my durango with out causing any problems. My durango is a2000 with a 4.7 and has 150000 mies

 

as long as its name brand oil with all the right API ratings it'll be fine. its a little thicker than 10w30 or 5w30. so if you live in a very cold climate it would be a better summertime oil than winter. i used to use 20w50 in my old chevy so it would leak slower... its still running with 300k.

 

The API's should be the same but it has a higher viscosity and a very high sheer factor. This means you need to change out the oil even more and there isn't as good of protection thus this is the reason it is being slowly discontinued. Now I wouldn't run it because your motor was never built for it and the oil jackets might be smaller not regulating proper flow and could cause problems. If you had a 5.2L or 5.9L I would say you would be pretty fine however the 4.7L was built with using 10W-30 and not the higher viscosity.

Regardless I tested it and found in my old 5.9L that it was scored and very dirty at only 800 miles and I had to pull it not to mention the motor sounded like crap and pressures were higher.


I would NOT use it!

 

10w40 will break down faster but when we say that, it means under a real long demand of the oil. through normal operation and standard interval oil changes 10W40 will stay 10W40.

Thicker oil would be useful in places like a drag strip because it will help prevent even more, metal to metal contact.

10W30 is the recommended oil and for the standard driver, should be used.