Does it matter if you mix engine oils?

it says they don't mix

it effectively says some don't, so for the purposes of the average person who doesn't have a lab to conduct extensive experiment, you don't mix the 2, ive never hear they turn to gel myth.

 

Pop a bit of primrose oil in to make it smell nice ..

 

You have asked on of your MTB friends..

 

Can't remember which one is in there now and need to top up

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The Halfords multi-grade is by far the better of the two, and it’s in a nice can. Use the Morris 30 for oiling the gate hinges.

 

Halfords it is ..ta