Mixing different types of Synthetic Oil...
#1
Mixing different types of Synthetic Oil...
Between our various BMW, Mercedes, Corvettes, Audi & Jaguar vehicles in our family, we all use Mobil 1, Castrol, & Pennzoil synthetic oil 5 quart jugs of various viscosity of 0w20 to 5w30.
Since we don't always use the full 10 quarts of the 2 Five quarts, there's always a few quarts left over this 5 quart jugs.
So question is: Is it OK to mix between:
- different brands of synthetic oil (Mobil 1 + Castrol, etc...)
- different viscosity (0w20 + 5w20, or 5w20 + 5w30, etc...)
- different shelf life/age (been sittin' on garage shelf for 1 yr + 2+ yrs...)
Thoughts...?
Thanks,
Since we don't always use the full 10 quarts of the 2 Five quarts, there's always a few quarts left over this 5 quart jugs.
So question is: Is it OK to mix between:
- different brands of synthetic oil (Mobil 1 + Castrol, etc...)
- different viscosity (0w20 + 5w20, or 5w20 + 5w30, etc...)
- different shelf life/age (been sittin' on garage shelf for 1 yr + 2+ yrs...)
Thoughts...?
Thanks,
#2
Join Date: Feb 2014
Location: Adelaide, South Australia
Posts: 8,463
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IMHO mixing different brands of the same oil is perfectly OK, I have done it many times with zero problems.
But it must be the same type, viscosity and spec oil, for example full synthetic 5W-20 that meets the Ford WSS M2C925-A spec of the earlier AJ133.
That said I believe there would be no problem at all with mixing 5W-20 and 0W-20 as long as everything else was the same.
But it must be the same type, viscosity and spec oil, for example full synthetic 5W-20 that meets the Ford WSS M2C925-A spec of the earlier AJ133.
That said I believe there would be no problem at all with mixing 5W-20 and 0W-20 as long as everything else was the same.
#3
Oil AGE has no bearing. 2 years isn't THAT old.
I've heard stories that extremely old oil should be shaken (not stirred, LOL) before pouring, to mix the additives...but I can't see into the plastic jugs that well, so I can't verify if this helps.
Like OzXFR, I've mixed oils in the past on my daily drivers...never an issue. (For those cars I buy whatever brand is on sale so I commonly mix brands)
Early in my driving career I mixed oil brands in the car below, and it burned a lot until I changed the oil again using a single brand. But that was the only time.
Don't laugh...I was single, and the seats on that Classic folded, to make a bed. HOT STUFF!
I've heard stories that extremely old oil should be shaken (not stirred, LOL) before pouring, to mix the additives...but I can't see into the plastic jugs that well, so I can't verify if this helps.
Like OzXFR, I've mixed oils in the past on my daily drivers...never an issue. (For those cars I buy whatever brand is on sale so I commonly mix brands)
Early in my driving career I mixed oil brands in the car below, and it burned a lot until I changed the oil again using a single brand. But that was the only time.
Don't laugh...I was single, and the seats on that Classic folded, to make a bed. HOT STUFF!
#4
Join Date: Feb 2014
Location: Adelaide, South Australia
Posts: 8,463
Received 3,226 Likes
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2,380 Posts
Oil AGE has no bearing. 2 years isn't THAT old.
I've heard stories that extremely old oil should be shaken (not stirred, LOL) before pouring, to mix the additives...but I can't see into the plastic jugs that well, so I can't verify if this helps.
Like OzXFR, I've mixed oils in the past on my daily drivers...never an issue. (For those cars I buy whatever brand is on sale so I commonly mix brands)
Early in my driving career I mixed oil brands in the car below, and it burned a lot until I changed the oil again using a single brand. But that was the only time.
Don't laugh...I was single, and the seats on that Classic folded, to make a bed. HOT STUFF!
I've heard stories that extremely old oil should be shaken (not stirred, LOL) before pouring, to mix the additives...but I can't see into the plastic jugs that well, so I can't verify if this helps.
Like OzXFR, I've mixed oils in the past on my daily drivers...never an issue. (For those cars I buy whatever brand is on sale so I commonly mix brands)
Early in my driving career I mixed oil brands in the car below, and it burned a lot until I changed the oil again using a single brand. But that was the only time.
Don't laugh...I was single, and the seats on that Classic folded, to make a bed. HOT STUFF!
And if memory serves it was the same colour as that one.
Extremely rare in Oz even back then let alone now.
#5
IMHO mixing different brands of the same oil is perfectly OK, I have done it many times with zero problems.
But it must be the same type, viscosity and spec oil, for example full synthetic 5W-20 that meets the Ford WSS M2C925-A spec of the earlier AJ133.
That said I believe there would be no problem at all with mixing 5W-20 and 0W-20 as long as everything else was the same.
But it must be the same type, viscosity and spec oil, for example full synthetic 5W-20 that meets the Ford WSS M2C925-A spec of the earlier AJ133.
That said I believe there would be no problem at all with mixing 5W-20 and 0W-20 as long as everything else was the same.
#6
#7
I'd just be cautious. If you have 0w-20 six quarts and used 5w-20 for the other .5 or 1.25 ... not a crisis. But for the F-type just buy the Castrol in boxes of six on Amazon and always have extra. Anything you are saving $$ by not taking your baby to the *********** offsets any expensive oil, etc.
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#8
#9
You mean the 0W & 5W will separate & layer ontop of each other, like oil & water?
& which one is on top? the OW or the 5W?
#10
The only way they could or would separate is if they had a different specific gravity....do they??
#11
#12
#13
The following 3 users liked this post by Unhingd:
#14
You should not mix oil.
First you have made a generalization- that synthetic is all the same. There are 3 different types of synthetics. Made from different ingredients.
The main reason is what are you going to put this concoction in? An old truck, chances are it will do terribly with 0w-20 oil. Or whatever mystery viscosity you end up with.
Here is what you can do with leftover oil.
Use it to flush our notoriously dirty engines.
Here is how, remove old oil, fill with concoction and lubegard engine flush, run for 5 minutes. Remove and fill new oil.
You wont believe how much gunk you get out, gunk that would oxidize new oil.
They actually make cheap oil for this purpose.
First you have made a generalization- that synthetic is all the same. There are 3 different types of synthetics. Made from different ingredients.
The main reason is what are you going to put this concoction in? An old truck, chances are it will do terribly with 0w-20 oil. Or whatever mystery viscosity you end up with.
Here is what you can do with leftover oil.
Use it to flush our notoriously dirty engines.
Here is how, remove old oil, fill with concoction and lubegard engine flush, run for 5 minutes. Remove and fill new oil.
You wont believe how much gunk you get out, gunk that would oxidize new oil.
They actually make cheap oil for this purpose.
#15
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