Oil Help!

[jonlk]

Afternoon All,

I've just realised I've topped one of our cars up with the wrong oil.

I've put 0w40 in instead of 0w30. Approx 750ml.

How big a mistake have I just made?

Tia.

[MuZiZZle]

10w?

[jonlk]

MuZiZZle said:

10w?

I deserve that!

I suppose a better question is: does the oil need dropping and replacing?

[wemorgan]

what's the year/make/model?
I ask because some cars can take 0/30 or 0/40. What matters more is whether the oil meets the OEM specification.

[jonlk]

It's an 08 Mini Cooper S.

The oil is Castrol Edge.

Cheers

[wemorgan]

It's only ~20% of the total capacity. I'd leave it in and consider bring the next service forward.

[jkh112]

I wouldn't worry about it. Less than a litre in a capacity of, at a guess, 5 litres is not going to make any noticeable difference.
Make sure you top it up with the right grade next time.

[steveo3002]

yeah id not worry too much at all..better than no oil

[MuZiZZle]

jonlk said:

I deserve that!

I suppose a better question is: does the oil need dropping and replacing?

Sorry I couldn't resist!

[jonlk]

Thanks All,

To be honest the rate it goes through oil it won't be in long... 1l every 1k.

[MuZiZZle]

jonlk said:

Thanks All,

To be honest the rate it goes through oil it won't be in long... 1l every 1k.

I just checked your garage, is that normal? Mines worse

[wemorgan]

MB says 1L/1000km is normal for a Smart car. I thought that kind of consumption was unique to their 600cc engine.

[MuZiZZle]

wemorgan said:

MB says 1L/1000km is normal for a Smart car. I thought that kind of consumption was unique to their 600cc engine.

BMW say 2.5L/1000 miles is acceptable on the E6X M5

[jonlk]

MuZiZZle said:

I just checked your garage, is that normal? Mines worse

I'm on mobile so can't see my garage but the CooperS has been checked by Mini as I thought the oil consumption was excessive and they say it's fine.

Iirc they weigh it for accuracy, we're at the very top end but by all accounts 1l in 1k miles is acceptable. Apparently...

How much is yours going through?

[MuZiZZle]

jonlk said:

I'm on mobile so can't see my garage but the CooperS has been checked by Mini as I thought the oil consumption was excessive and they say it's fine.

Iirc they weigh it for accuracy, we're at the very top end but by all accounts 1l in 1k miles is acceptable. Apparently...

How much is yours going through?

Gallons of the stuff!

I thought this was an R32 you'd misfilled, my bad

[jonlk]

MuZiZZle said:

BMW say 2.5L/1000 miles is acceptable on the E6X M5

I'm sure the e46 M3 I had wasn't that bad!

[GB123]

Assuming it's fully synthetic there's not really much to worry about, different grades can be mixed no problem.

[jonlk]

MuZiZZle said:

Gallons of the stuff!

I thought this was an R32 you'd misfilled, my bad

I really need to update that!

I had the R32 from new and it hardly used any, didn't do a lot of miles in it though.

[jonlk]

GB123 said:

Assuming it's fully synthetic there's not really much to worry about, different grades can be mixed no problem.

Yeah, both fully synth Edge.

[TheEnd]

It won't cause any problems, if there is some info in the handbook, it'll most likely mention a range of different grades for different expected temperatures.