Mixing Synthetic & Dino Oil

[L-Aholic]

I was changing my oil and had some Rotella T 5W-40 full synthetic left over from another change and a some Castrol 10W-40. Any opinions on mixing the two? I would assume they are compatible but wanted any other opinions. I am possibly going to change over to full synthetic but wanted to ease it in and verify I do not get any leaks in the process. I have an 83 1100 8 valve motor. Thanks

[chuckycheese]

Mix

I wouldn't mix the two except in an emergency but....a number of the guys have had good luck with the Rotella.

[Nessism]

Mix away. No worry what so ever. They even sell mixed oils in the bottle.

[bwringer]

I mix and switch back and forth willy-nilly between synth and dino, and have never had a problem.

Crikey, after 30 years, the urban legends surrounding synthetic oil just won't die...

[Guest]

You'll blow up your engine.*

[rapidray]

You'll blow up your engine.*

Bill, where the heck did you come up with that statement?! Mix the oil & have NO fears as there are no worries with blending the 2. Ray.

[Guest]

You'll blow up your engine.*

and the star at the end of your statement indicates that it's a JOKE i guess

[dardoonk]

As long as you use a blender, add a cherry & one of those little umbrella's. :-D

[L-Aholic]

Thanks for the replies (well most of them :-D). I completed my oil change, went for a spin and my motor has not blown up yet but the day is still early. 8-[

[Texatl]

I don't think it'll be a problem. I accidentally did the same in my SV1000 and called my dealer in a panic. They told me most of the Suzuki brand synthetic is actually "blend" anyway- 1/2 syn 1/2 dino.

So I'd say you'll be OK. 8-)

[twistedwankel]

Mix away. No worry what so ever. They even sell mixed oils in the bottle.

ditto\\/

[Grandpa]

I've been mixing oils for years.

Just add clean, fresh oil when necessary to top off the crankcase, without overfilling. Mixing dino 10W40 with existing Rotella will be no problem.

The important thing is to keep the oil level where it should be, at all times.

[Guest]

You'll blow up your engine.*

JOKE..............

[rustybronco]

The only thing I suggest you don't mix with it is alkeyhaul.

[TheCafeKid]

How bout this one.... Manuals say 10w40. I just filled with 15w40...why? Cos she seems to like it better. And its starting to get nice and warm around here. Supposed to hit 91 in the next day or so!!