When I had my oil changed they used Quaker state full synthetic 5w-30. My car is a bit of a burner and after about 3000 miles its down about a quart. All I have in my garage currently is Quaker state Horsepower 10w-30 fully synthetic oil. Just wondering if it would be safe to mix them I dont see why not but I dont want to risk it before asking.... thanks

 

Should be fine, 10W-30 is just a little thicker thats all.

 

i mix oils all the time. synthetic with dyno and also different grades

 

It even says on the bottle that you can mix with anything, doesn't it?

Want to try out the mobil 1 high mileage for us

 

too late now I already put the Quaker state in. next oil change ill try the Mobile 1 High Mileage blend. ive heard good things.

 

Love the avatar...

 

OT, but I can't remove the avatar haha

I'll be trying out the high mileage soon.

 

Made it to advanced (for the sale) and all they had was 10w-40 high mileage (does mobile have other weights ). Like it matters, summers a ***** here and the engine runs hot anyway. I might resurrect this again (even though it's OT haha) when I have to change the oil again (gonna do 8k probably).

 

Don't they advise against switching from dyno to fully synthetic once the car has over 100k? Changing the viscosity/weight is okay?