oil 5W30 on an XJS 1996
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Kind of normal.
I would have thought that the 6ltr would have the "idiot switch" for that gauge, as apposed to the "real time" switch of the earlier engines.
5W30 is a tad light??????. but at 10K miles, maybe not. If it were mine I would be using 10W40, either Syn or Mineral.
There will NOT be a pressure issue, or a flow issue, the V12 oil pump is just way too good for that.
I would have thought that the 6ltr would have the "idiot switch" for that gauge, as apposed to the "real time" switch of the earlier engines.
5W30 is a tad light??????. but at 10K miles, maybe not. If it were mine I would be using 10W40, either Syn or Mineral.
There will NOT be a pressure issue, or a flow issue, the V12 oil pump is just way too good for that.
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Terry007 (09-21-2016)
#3
Terry,
Your sig doesn't say but I'm guessing you've got a 4 litre engine?
I'd also have gone for 10/40 semi-synthetic but each to their own. I suspect 5/30 is ok but it's a bit too thin for my liking. That might explain it sitting a bit low at idle.
A fluctuating pressure gauge is as it should be although with 10/40 I wouldn't expect it to sit under 2 bar at idle unless it's very hot. If it's a 4 litre engine it should be 2.75 bar at 2000rpm.
Cheers
Paul
Your sig doesn't say but I'm guessing you've got a 4 litre engine?
I'd also have gone for 10/40 semi-synthetic but each to their own. I suspect 5/30 is ok but it's a bit too thin for my liking. That might explain it sitting a bit low at idle.
A fluctuating pressure gauge is as it should be although with 10/40 I wouldn't expect it to sit under 2 bar at idle unless it's very hot. If it's a 4 litre engine it should be 2.75 bar at 2000rpm.
Cheers
Paul
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Terry007 (09-21-2016)
#4
I recently did a oil/filter change and went with Maxlife semi-syn 10W40 and am very happy with how it is running. I have used Mobil 1 0W40 in the past but the V12 really seems to like the Maxlife oil. I have also used 20W50 before and 0W40 and 10W40 did not lower the oil pressure at warm idle. Pressure stays up... Also can not beat the price of $17 for 5 quarts jugs at Walmart... LOL.
Last edited by XJSFan; 09-21-2016 at 09:15 AM.
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There is a guy (Vee) running 0w something synthetic in his 96... The AJ16 can take it. That being said, I've tried 5w 30, 10w30 and my sweet spot is 10w40 Mobil 1 synthetic for high mileage in my AJ16. It really keeps my engine quieter, not just psychological as the chain tensioners on this car will make a little noise as they get higher mileage. But yeah, I would certainly stick to full synthetic of your choice.
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#10
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#11
Terry,
If your oil pressure sender unit is original, then it probably is the true variable type. Your comment that the gauge fluctuates seems to confirm this. Jaguar only brought out the replacement unit in response to complaints from US owners of the AJ16 engine who thought it was wrong for the readings to go up and down with engine rpm. If you've got the original type and it's reading correctly, then stick with it. I have the original type in my AJ16-engined car and feel much more comfortable thinking that I'm looking at the actual pressure rather than a false mid-point position on the gauge.
Paul
If your oil pressure sender unit is original, then it probably is the true variable type. Your comment that the gauge fluctuates seems to confirm this. Jaguar only brought out the replacement unit in response to complaints from US owners of the AJ16 engine who thought it was wrong for the readings to go up and down with engine rpm. If you've got the original type and it's reading correctly, then stick with it. I have the original type in my AJ16-engined car and feel much more comfortable thinking that I'm looking at the actual pressure rather than a false mid-point position on the gauge.
Paul
#12
I have tried just about every oil in different weights in many different vehicles. Motor oil/filter changed at 5K or less then conventional oil is the way to go(if you change your own oil, try Maxlife semi-syn red bottle). If you drive 7500 miles in a year, then Mobil 1 10W40 HM might be best for you, especially in a hot climate like Los Angeles... Oils and filters are so much better today then 20 years ago, so any name brand will work well for you. Play it safe and go 10W40.
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