Mixing oils: 5w20 with 5w30
#1
Mixing oils: 5w20 with 5w30
I know mixing between brands and mixing between synthetic and dino could give me problems, but would there be any problem between mixing 5w20 Royal Purple with 5w30 Royal purple.
I have a 2006 is350 and have 3 quarts of 5w30 Royal purple oil. The autostore near me are out of 5w30 so I am considering buying 3 quarts of 5w20 Royal purple and mixing them together. I know our car calls for 5w30, but the TSB release changed it to 5w20; therefore getting a mixture inbetween shouldn't do any harm right?
I just want to hear feedback to make sure I am not doing a bone headed move.
I have a 2006 is350 and have 3 quarts of 5w30 Royal purple oil. The autostore near me are out of 5w30 so I am considering buying 3 quarts of 5w20 Royal purple and mixing them together. I know our car calls for 5w30, but the TSB release changed it to 5w20; therefore getting a mixture inbetween shouldn't do any harm right?
I just want to hear feedback to make sure I am not doing a bone headed move.
#6
Lexus Test Driver
I would not recommend mixing weights. While there is a minimal viscosity difference between 5W20 and 5W30, there is a difference. I also have an '06 IS350 and have used 5W30 since I bought the car. When i first bought it (used) I nearly lost my mind when I saw that it took 5W20 and saw 5W30 written on the oil change sticker from the dealer. I later found out about the TSB. If you mix them, you are running somewhere in the middle. I am OCD about a lot of things, and motor oil is a super sensitive subject as it plays such a significant role in your engine's performance and longevity. Go to another store and get 5W30 bro, for peace of mind if nothing else.
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#10
Lexus Fanatic
iTrader: (1)
yeah, he'd be fine running what would basically be 5W25
And for the record, there's nothing wrong with mixing dino and synthetic either...the two are entirely compatible.... in fact they even sell oil already mixed this way- it's called a synthetic blend.
You do lose much of the benefit from running a full synthetic if you mix, but it's not like it'll cause a nuclear reaction or anything.
And for the record, there's nothing wrong with mixing dino and synthetic either...the two are entirely compatible.... in fact they even sell oil already mixed this way- it's called a synthetic blend.
You do lose much of the benefit from running a full synthetic if you mix, but it's not like it'll cause a nuclear reaction or anything.
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