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Which Engine oil do you use??

7K views 78 replies 54 participants last post by  acharrier 
#1 ·
Hi Guys,

I have 2003 Rubi - 29,000 miles on it. Is anyone using synthetic oil in their engine? What weight of oil are you using? I am in Southern CA - Hot Hot Hot so cold morning starts are not an issue here. I wheel in the desert - slow stuff and some city traffic.
 
#72 ·
I also use the Rotella 10-30w with a Bosch filter. I don't know what the previous owner had in there but the oil psi went back to normal (little over 40) and it stopped blanking out at 0 when slowing down and making turns. (?)
 
#73 ·
Regular ol' Valvoline 10w-30 in the summer, 5w-30 in the winter. The 4.0l is a 40 year old tractor engine. Keep something in it, change it on a regular basis, and you're not going to have an engine oil related failure. I've personally seen a 4.0 go through hell, ie no oil on the dipstick. Filled it back up and ran fine for many many more miles.
 
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