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#765266 - 11/09/06 09:45 PM Can I use 5W20 instead of 5W30?
sifan Offline


Registered: 10/21/03
Posts: 933
Loc: Maryland, USA
With $15 rebate offer from Quaker State on its Q Torque synthetic oil I went to AAP yesterday and bought 12 quarts 9buy 1 get 1 free) of 5W20 because that was all they had. My 2003 Toyota Echo engine specifies for 5W30. Since Toyota now uses 5W20 on their 2007 model cars, I wonder if I can use the 5W20 on my Echo? If not, will it be OK to mix it with 5W40 oil on 1:1 ratio to achieve final 5W30?

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#765267 - 11/09/06 10:41 PM Re: Can I use 5W20 instead of 5W30? [Re: sifan]
Titan Offline


Registered: 10/04/05
Posts: 2331
Loc: Charlotte Metro area
Personally, I would mix it.
_________________________
The terms "dino,synthetic,blend,conventional" are marketing terms; not scientific terms.

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#765268 - 11/09/06 10:42 PM Re: Can I use 5W20 instead of 5W30? [Re: Titan]
Titan Offline


Registered: 10/04/05
Posts: 2331
Loc: Charlotte Metro area
Oh, I forgot to say: I would mix it with 5-30, not 5-40.
_________________________
The terms "dino,synthetic,blend,conventional" are marketing terms; not scientific terms.

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#765269 - 11/09/06 10:48 PM Re: Can I use 5W20 instead of 5W30? [Re: Titan]
Patman Offline



Registered: 05/27/02
Posts: 19723
Loc: Oakville, Ontario
I wouldn't bother mixing it at all, I'd run the 5w20 with confidence, especially in the wintertime when your oil temps won't be that high anyhow.

A lot of people fail to realize that the difference in viscosity between most 5w20s and most 5w30s is only about 1.5 cst at 100c. So it's not really a huge difference. And a lot of conventional 5w30s end up thinning out by almost that much anyhow.
_________________________
2005 Corvette (M1 5w30 & Fram Ultra)
2006 Civic EX Coupe (M1 0w20 & Fram Ultra)
2010 BMW 328i X-Drive (M1 0w40 & Mann filter)
2018 Corvette (on order, build week of Dec 4)

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