mixing oils ?

[jackal]

is it ok to mix oils if they are the same ?

i use Royal Purple 10/40 which is a synthetic
presumably a 'fully synthetic' as opposed to 'semi' ?


i will get a full oil change soon so it would only be for a few months or so

[tegwin]

Provided its the same brand of oil, then topping up with the same weight and brand is fine..

I would be a bit cautious about mixing say castrol with brandZ oils.... Do a complete change if you are unsure of the origioonal oil type

[rev-erend]

The question has been asked before and the best answer is not to mix them but another answer is that all oils are mixtures .. some fully synthetic oils like Royal purple are very exotic blends with excellent and expensive ingredients and to add another mixure will surely dilute this great and throughly researched blend.

But then again - it's better to have a full engine of oil than one barely touching the dipstick.

The choice really is yours.

[Busa_Rush]

Doesn't make any difference, unless one oil is water based and another is oil based

They all mix together fine except some of the very odd or rare race oils, any oil used in a road car will mix fine with any other oil. Even franchised dealerships change their oils depending on who's giving them the best deal that quarter . . .

As long as you only feed it oil that's of the required grade and specification you'll be fine.