Mixing oil

[lazyitus]

My Griff 500 currently uses Mobil 0W40.

It needs topping up. What would be the effect of topping up with 15W50 Mobil Motorsport oil?

Should I stick with 0W40?

[lazyitus]

Please feel free to give your advice

[snorky]

you can mix 0W40 and MS no problem at all..... but

IMHO - I wouldn't waste your cash on Mobil 1 at all. When I first bought my Chim it had Mobil 1 0W40 in it and it leaked all the time. 0W40 "creeps" like bloody antifreeze and will find any way it can onto the garage floor. So I then filled it with 15W50 MSport Mobil 1 and it improved the oil press etc and still leaked but not as much. Just been serviced and been filled with boggo Castrol GTX. Remember that when these engines were devised the clearances etc were done with multigrades in mind -synthetic oil wasn't readily available then so isn't appropriate IMHO. Use a normal multigrade and change it often and don't waste you cash on fancy synthetic oil that is frankly a waste of technology on our Chim engine.........let the flaming commence

>> Edited by snorky on Monday 8th March 12:10

[shpub]

Who wants to start a big religious war. Big section on the various heresies/gospels in the bible. I would use a good synthetic in a TVR Rover V8 simply because of the heat and temp. Multigrades and mineral oils very very quickly degrade and sludge up and need frequent changing. As for the clearances etc might be true if the engine was a P5 version but the engine has been frequently updated and modified since then.

Steve
www.tvrbooks.co.uk

[lazyitus]

shpub said:

Who wants to start a big religious war. Big section on the various heresies/gospels in the bible. I would use a good synthetic in a TVR Rover V8 simply because of the heat and temp. Multigrades and mineral oils very very quickly degrade and sludge up and need frequent changing. As for the clearances etc might be true if the engine was a P5 version but the engine has been frequently updated and modified since then. Steve www.tvrbooks.co.uk

Steve, I checked the bible this morning and noted what you'd said about not mixing the different types. Did this just mean in the running in period or for all times? It read as if it could have meant just for the running in period.

Cheers
Lazy

[shpub]

All times. I think it is pretty clear.

[lazyitus]

shpub said:

All times. I think it is pretty clear.

I'm sure it is clear. I just can't read properly at 6 in the morning. My eyes aren't properly open until about 10.30.

[_DJ_]

Steve - Just for clarity:

You shouldn't mix oils (different brands/thicknesses), or you shouldn't mix oil of different tyres (i.e semi and fully synthetic)?

[DustyC]

lazyitus said:

shpub said: All times. I think it is pretty clear. I'm sure it is clear. I just can't read properly at 6 in the morning. My eyes aren't properly open until about 10.30.

Hence the name!

[shpub]

Ideally I wouldn't mix brands but the main concern is type. Synthetic needs to go with synthetic, mineral with mineral etc. If you don't the resulting oil does not have the same lubrication characteristics.

[lazyitus]

Very helpful chaps, thanks.