mixing viscosity of the same brand

[vorteXtreme759]

Is it OK to mix oil viscositys Of the same brand? My mix would be 2 quarts 5w20 & 2 qts 0w30 or 5w30.

Of either amsoil or mobil 1. Would there be any adverse affects?

 

[simple_gifts]

Quote:

Of either amsoil or mobil 1. Would there be any adverse affects?


Other than the rage and contempt of 1/2 of the board members, no.

 

[NMBurb02]

You will be fine, especially if it is of the same brand and API rating. Plenty of BITOGers have run frankenbrews consisting of different viscosities and brands with no ill effects.

 

[vorteXtreme759]

so other than people telling me that Gm knew what they were doing when they put 5W30 on my oil cap. There should be no adverse affects to the chemicals in the oil?

 

[NMBurb02]

Originally Posted By: vorteXtreme759
so other than people telling me that Gm knew what they were doing when they put 5W30 on my oil cap. There should be no adverse affects to the chemicals in the oil?

It's not ideal because you do not get the same concentrations of the same additives to perform the same jobs (some oils use different additives for anti-wear or cleaning), but there shouldn't be any dire consequences.

 

[901Memphis]

Mixing is okay especially if it's something like Amsoil that uses similar add packs as many others do too. You can make some pretty cool products by blending other stuff also.

If you haven't heard of the Caterham blend it's pretty sweet on paper and has produced good used oil analysis in the past. It consists of 40% of Mobil 1 0W40 European Formula and 60% Toyota Genuine 0w20 synthetic oil. It can be achieved by mixing 2:3 quarts easily for a 5 quart sump and makes a very good looking 0w30. Typically a person would buy the jug of 0w40 and make more than one batch with it due to its amazing price point. The individual quarts of Toyota 0w20 are available at the dealer.

Mix away.

 

[dparm]

API requires that oils be mixable. In fact, many oil manufacturers tell you to do this if you need a certain viscosity (Red Line comes to mind, but others claim it too).

 

[TFB1]

My bet is probably half the vehicles you ride by every day has some mix in the crankcase due to adding this or that oil... None of those are rolling over dead littering the highways...

 

[dlundblad]

If you're going to mix Amsoil with M1, you would be better off just mixing M1 and used French fry grease. It would be cheaper and you would achieve the same outcome.

 

[Flareside302]

Originally Posted By: dlundblad
If you're going to mix Amsoil with M1, you would be better off just mixing M1 and used French fry grease. It would be cheaper and you would achieve the same outcome.

wow what a [censored] post.. he's not talking mixing 2 different brands.. but even if so it won't hurt. and to compare Amsoil to used French fry oil is ignorant.

 

[dlundblad]

Originally Posted By: Flareside302
Originally Posted By: dlundblad
If you're going to mix Amsoil with M1, you would be better off just mixing M1 and used French fry grease. It would be cheaper and you would achieve the same outcome.

wow what a [censored] post.. he's not talking mixing 2 different brands.. but even if so it won't hurt. and to compare Amsoil to used French fry oil is ignorant.


Does this

mean anything to you? Good to see you can take some humor.

 

[vorteXtreme759]

Well thanks for the responseees. I have a good idea what I'll try now.

 

[nepadriver]

Originally Posted By: vorteXtreme759
Is it OK to mix oil viscositys Of the same brand? My mix would be 2 quarts 5w20 & 2 qts 0w30 or 5w30.

Of either amsoil or mobil 1. Would there be any adverse affects?


What does your owners manual say? One of mine says (which will cause certain bitogers head to explode):

Page 11-11 OM 2010 Subaru Forester 2.5L NA engine "When adding oil, different brands may be used together as long as they are the same API classification and SAE viscosity as those recommended by SUBARU."

Which viscosities are recommended in the OM?

5w30
5w-40
10w-30
10w-40
10w-50
Hot/Desert/Heavy Duty (SM or SL)
SAE 30
SAE 40
10w-50
20w-40
20w-50

 

[artificialist]

I suppose if the different viscosity grades had major differences in add packs, then the result might not be ideal. However, I wouldn't worry too much.

After all, even if you used the same brand and viscosity of oil during the life of your car, there would still be differences in the oil's chemistry.

Anyway, I have a sort of mix in my car. 4.5qt Castrol 0w40, .1qt Castrol 5w40.

 

[demarpaint]

We stress about mixing different grades within the same brand. I wonder how many cars on the road today are just about ready to trip the low oil warning light, or are driving around with oil in service twice as long as it should be.

OP-Mix away!