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Mixing different grades of oil

S

sheep911uk

New member
is it ok to mix different grades of oil i have castrol magnatec 10w 40 in my car but bought magnatec 5w 40 in error,my cars booked in for a service in a few months is it ok to top up the engine with the 5w 40?
Thanks
 
Im sure that it has been discussed before (what is the best oil for the 3.2)
From memory it has been said that full synth oils are more prone to leaks due to their viscosity - I have used Shell Helix since owning the car (6 years) and I have been very pleased with the results (but in fairness have little to compare with - other than zero leaks).
Im not sure that mixing the oil grades is advisable, however knowledge of others on the subject may prove me wrong.

Cheers
Adam
 
ORIGINAL: sheep911uk

is it ok to mix different grades of oil i have castrol magnatec 10w 40 in my car but bought magnatec 5w 40 in error,my cars booked in for a service in a few months is it ok to top up the engine with the 5w 40?
Thanks
Click to expand...

Should be fine.
 
ORIGINAL: totsnap
Im not sure that mixing the oil grades is advisable, however knowledge of others on the subject may prove me wrong.
Click to expand...

I knew that I would be wrong - I was under the idea that mixing grades was not a good idea, but as I said Id be proved wrong - LOL
 
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