Oil Grade

[jeffluent]

Car is 2litre 140 with 85k on the clock.It is using a bit of oil.I was using 5-30 fully synthetic,should I switch to 5-40 or even 10-40?

[gazza82]

Should be 5W40 full synthetic.

[jeffluent]

I made a mistake,I do use 5-40.Question is should I move to 10-40?

[GrandadMonkey]

Personally I wouldn't with winter approaching. But if you're changing it every year or 10k and use a genuine filter then I don't think it would do any harm.

My daughter's 207 is using oil too but we've stuck with the correct grade and just top it up every 3 months or so. I think the previous owner probably took the 20,000 miles or 2 years service interval too literally - too long in my opinion. I suspect the rings are gummed up. It runs ok though, with no blue smoke.

[gazza82]

+1 to above!

[Spitfire6]

I would switch to 0w40. Less oil pressure at start up & the oil will flow better when cold. Sync of course.

Cheers,
Iain.

[IanL]

Why is less oil pressure at start up an advantage? I would have thought it a disadvantage.

[Spitfire6]

Hi,
The oil pump would be able to pump more oil at startup, so the oil pressure would be less.
The other extreme would be very thick oil; You would have high oil pressure and no flow.

If your oil pressure drops while driving, that's a different matter.

I hope that explains my statement.
Cheers,
Iain.

[jeffluent]

Decided to move to Mobil1 10-40 in the spring.This is advertised as a high mileage oil for 5-40 users.

[gazza82]

85k isn't high mileage ... Just run in

I didn't even change my Alfa at 150k to thicker 10w60 oil as some suggested ...

Still running on 10w40 at 204,795 miles ...