Is it okay to mix oil brands?

Hi All,

I am about to do an oil change and have several brands of oil but only one quart of each. I read in the manual that the WR450 takes just over a quart for a full oil change (oil and filter). One, am I correct in the amount of oil, and two, is it terrible to use two different brands of oil if they are the same weight? Also, would it matter if the oils were synthetic or dino? This is my first oil change so I'm not exactly sure how much oil the bike will use.

My gut says don't do it, but I really don't want to go to the store for oil tonight (we have a ride tomorrow).

Thanks,

Nate

You will be okay... just ride then change it again. I mixed rotella w/ yamalube one time with no ill results...

just DON'T mix synthetic and dino oil together.

Thanks for the replies.

Nate

just DON'T mix synthetic and dino oil together.

Why? :excuseme:

Dont mix brands of oil together. A lot of times the oils can have bad reactions to each other and cause sludge inside your engine.

Just go buy some more oil, its not that expensive.

Why? :excuseme:

because they don't mix together. They stay separated.

because they don't mix together. They stay separated.

WRONG....synthetic mixes just fine with conventional oil. They are very compatible.

WRONG....synthetic mixes just fine with conventional oil. They are very compatible.

That's what I thought..... hence semi-synthetic oils!

Ever heard of synthetic-blend? Castrol GTX makes it.

what about pre-mix oil. can u mix brands and synthetics?

I have always been told not to mix Syn premix with dino. Don't know why.

To me, oil is so cheap, why take a chance that you happen to find the two kinds that aren't compatible? Especially in your expensive high performance dirt bike. Run the leftovers in your lawn mower. It is easier to explain to your wife that you need a new mower.

Ever heard of synthetic-blend? Castrol GTX makes it.

As does EVERY other mfg.

My friend not only mixed different manufactures and weights, but also conventional with semi-synthetic. On his first kick start the bike blew-up in a gigantic ball of flame (Hollywood style). He was lucky to escape with his life and only had some singed hair on his arms.

HE WILL NEVER DO THAT AGAIN!!!

My friend not only mixed different manufactures and weights, but also conventional with semi-synthetic. On his first kick start the bike blew-up in a gigantic ball of flame (Hollywood style). He was lucky to escape with his life and only had some singed hair on his arms.

HE WILL NEVER DO THAT AGAIN!!!

LOL, good to know. thnks for passing this information on.

Umm ... sounds more like he had a gas leak somewhere...oil will not burn rapidly like gas UNLESS it is pumped through a fine orifice into the air as an ultra fine mist, and then needs a high energy ignition source, like in an oil furnace. Mixed brands of oil are all still oil...

Edited by gsa102
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