Is 10w30 good to use?
#1
Is 10w30 good to use?
I have a 1998 jaguar xj8 and the previous owner put 5w30 but i think that's too thin considering it has 102k miles and its a v8. What do you guys think? I used mobil super 5000 10w30 by the way and temps range from 40 to 70f where im from but summer is right around the corner.
#2
Motor oil questions could be met with a wide variety of responses....haha
It seems to be a topic in which there are a lot of subjective and emotional reactions. There is tons of motor oil info in the various threads on here if you want to search. Some are extremely technical and pretty interesting, others turn into mild slap-fests. Well, not really. The Jaguar folks are pretty polite people as a whole.
I will tell you what "I' use, and leave it at that. Mobile 1 full-synthetic 0w40 European formula. I am considering changing to a 15w40, but can't really give you a good reason why, lol.
My general opinion is that changing the oil regularly is probably more important than the specific oil you choose.
It seems to be a topic in which there are a lot of subjective and emotional reactions. There is tons of motor oil info in the various threads on here if you want to search. Some are extremely technical and pretty interesting, others turn into mild slap-fests. Well, not really. The Jaguar folks are pretty polite people as a whole.
I will tell you what "I' use, and leave it at that. Mobile 1 full-synthetic 0w40 European formula. I am considering changing to a 15w40, but can't really give you a good reason why, lol.
My general opinion is that changing the oil regularly is probably more important than the specific oil you choose.
The following users liked this post:
toaster (04-20-2017)
#4
And we're off....
I read about 900 posts regarding oil when I got my first XJR. There was a specific rating called for in the XJR that the oil I currently use meets (and many didn't), don't remember what it was now. Once I came to a conclusion after all of that reading I'm now hesitant to re-visit the issue.
I read about 900 posts regarding oil when I got my first XJR. There was a specific rating called for in the XJR that the oil I currently use meets (and many didn't), don't remember what it was now. Once I came to a conclusion after all of that reading I'm now hesitant to re-visit the issue.
#7
Are you using/burning oil, have rattling noise(s) in the motor, done a plastigauge check or any other such signals of worn parts that may require a thicker oil? A thicker oil only babies it a little longer before immanent failure for those conditions. If not, stay with what is specced, like Mikey says, don't second guess Jag....I use Royal Purple myself.
It all comes down to how hard or well kept your motor was. A thicker oil can be an issue in a good motor if your journals/clearances are not made to function with it. If it was, they would have specced that. You could wind up starving your OHC or any other area. It can be a slow death, usually at startup when oil is thickest.
It all comes down to how hard or well kept your motor was. A thicker oil can be an issue in a good motor if your journals/clearances are not made to function with it. If it was, they would have specced that. You could wind up starving your OHC or any other area. It can be a slow death, usually at startup when oil is thickest.
Trending Topics
#8
Are you using/burning oil, have rattling noise(s) in the motor, done a plastigauge check or any other such signals of worn parts that may require a thicker oil? A thicker oil only babies it a little longer before immanent failure for those conditions. If not, stay with what is specced, like Mikey says, don't second guess Jag....I use Royal Purple myself.
It all comes down to how hard or well kept your motor was. A thicker oil can be an issue in a good motor if your journals/clearances are not made to function with it. If it was, they would have specced that. You could wind up starving your OHC or any other area. It can be a slow death, usually at startup when oil is thickest.
It all comes down to how hard or well kept your motor was. A thicker oil can be an issue in a good motor if your journals/clearances are not made to function with it. If it was, they would have specced that. You could wind up starving your OHC or any other area. It can be a slow death, usually at startup when oil is thickest.
#9
#11
I'm also sure it says nothing about using synthetics as your car was manufactured long before such oils became mandatory.
You can choose which ever oil you like that meets the Jag requirement. Going beyond that with exotic brands or types might make you happy, but the car couldn't care less.
#13
+1 Same viscosity when hot: switch back to 5w30 in the late Fall. Maybe 10w40 full synthetic for summer and lighter synthetic for winter so it turns over at -20F.
As for the driver's manual diagram on oil viscosity -- useless! At least for the 01s I had. . . pick your temperature range and choose all sorts of weights . . .
I like my Range Rover: 5w20 full synthetic, unambiguous..
As for the driver's manual diagram on oil viscosity -- useless! At least for the 01s I had. . . pick your temperature range and choose all sorts of weights . . .
I like my Range Rover: 5w20 full synthetic, unambiguous..
#15
The manual says i can even use 10w30 if i liked and 5w40 is for winter and for maximum fuel economy.
Are you using/burning oil, have rattling noise(s) in the motor, done a plastigauge check or any other such signals of worn parts that may require a thicker oil? A thicker oil only babies it a little longer before immanent failure for those conditions. If not, stay with what is specced, like Mikey says, don't second guess Jag....I use Royal Purple myself.
It all comes down to how hard or well kept your motor was. A thicker oil can be an issue in a good motor if your journals/clearances are not made to function with it. If it was, they would have specced that. You could wind up starving your OHC or any other area. It can be a slow death, usually at startup when oil is thickest.
It all comes down to how hard or well kept your motor was. A thicker oil can be an issue in a good motor if your journals/clearances are not made to function with it. If it was, they would have specced that. You could wind up starving your OHC or any other area. It can be a slow death, usually at startup when oil is thickest.
Last edited by 1998XJ8; 04-20-2017 at 08:16 PM.
The following users liked this post:
nilanium (04-22-2017)
#16
Looks like the previous owner was correct in choosing 5W30.
#17
#18
So before you bought it, did you do a basic run through and run your finger around the inside of the exhaust tip for oily residue or smell the oil on the dipstick for a singe smell? Did you watch the exhaust when you (or a friend) revved it for blueish smoke? Whenever you buy a SC sport saloon, expect it to have been run hard. Unless owned by a little old lady, then be doubly aware, because grandpa may have been a 1/4 miler.
I'd run it with the 10/30 for awhile and see what it does, since you don't know. Running it with that oil will only gain you that knowledge and its already in there. Check it once a week for a month or two and then make that determination.