jagdriver727
Site Donor 2021
I’ll admit that I’m not an expert on these. What I do know, is I just recently got an ‘87 XJ-S with the 5.3L HE V12 and it has a jiffy lube sticker in the windshield calling for 5W-30 conventional and that is not even close to what it needs.
If somebody with some experience with these engines could chime in, I’d appreciate it. If I had to guess at it, I’d be going with a 15W-40 or a 20W-50 but I’m unsure what specs or properties to look out for.
If somebody with some experience with these engines could chime in, I’d appreciate it. If I had to guess at it, I’d be going with a 15W-40 or a 20W-50 but I’m unsure what specs or properties to look out for.