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Mixing synthetic 5w-30and 10-30 ?

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Old 03-14-2009, 06:51 AM
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Mixing synthetic 5w-30and 10-30 ?
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
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Old 03-14-2009, 07:48 AM
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Should be fine, 10W-30 is just a little thicker thats all.
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Old 03-14-2009, 09:09 AM
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i mix oils all the time. synthetic with dyno and also different grades
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Old 03-14-2009, 10:35 AM
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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
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Old 03-14-2009, 08:39 PM
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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.
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Old 03-14-2009, 09:39 PM
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Originally Posted by Child_uv_KoRn
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

Love the avatar...
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Old 03-15-2009, 11:42 AM
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Originally Posted by rroderiques77
Love the avatar...
OT, but I can't remove the avatar haha

I'll be trying out the high mileage soon.
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Old 03-21-2009, 08:52 PM
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Originally Posted by Child_uv_KoRn
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).
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Old 03-21-2009, 09:22 PM
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Don't they advise against switching from dyno to fully synthetic once the car has over 100k? Changing the viscosity/weight is okay?
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