On 29/06/2018 19:42, The Natural Philosopher wrote:
On 29/06/18 17:57, wrote:
Hi All

I have an old Audi A4 which consumes a lot of oil and has done for
years. MOT test fine and no obvious leaks nor particularly smokey.Â* We
have been using 5w30 fully synthetic oil and to be honest given how
long a litre of it lasts (around 400 miles for a litre) I can't
imagine whatever we put in it would make much difference.

I have looked online and some seem to say to use this oil and some
mineral oil. Also, I was wondering if a thicker one would be better
(assume 5w40 is thicker?).

Will changing to a synthetic 5w40 or even to mineral oil make any
difference?

Any oil / engine buffs out there?

10/40 prolly work best

But when you get to that stage, you are just getting the last out of te
engine so any old **** will do.

Prolly valve seals or guides gone



Changing to 5-40 won't make much difference. That just changes the range
of viscosity compared to 5-30 over a wider temp range. Look he

https://mechanics.stackexchange.com/...nt-engine-oils

I'd not go to a thicker oil, such as SAE10-30. Chances are you've gunge
in there anyway and the last thing you want is trouble with oil circulation.

You could risk a semi-synthetic oil or bulk buy cheap synthetic.

A litre in 400 miles is a lot. I don't put in a litre in 10k miles! My
Honda CRV (80k miles) didn't need topping up between annual changes.


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