I have 6 quarts of redline 5w-40 oil from a previous Audi I used to own. I now own a 2011 Subaru Outback which specifies 5w-30 oil, but hate for the redline to go to waste. Thoughts?
5w-40 in a Subaru Outback
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Is yours the turbo? IIRC Redline's 5w40 is quite heavy. Probably not the best (drop in MPG and power) but it would work.
I say you just sell the Redline.
I say you just sell the Redline.
Theres probably no harm in mixing it into your 5W30 changes a quart or 2 at a time.
Buy 6 quarts Redline 5w-20 and mixing half and half with 5W40 to make 5W30.
No harm at all in using it; do so with confidence. But maybe wait until warmer weather.
"Planet Earth" is a big place, it might help the rest of us make more sensible recommendations based on the expected winter & summer cold start & ambient temps if you put a more logical location in your profile.
"Planet Earth" is a big place, it might help the rest of us make more sensible recommendations based on the expected winter & summer cold start & ambient temps if you put a more logical location in your profile.
Originally Posted By: dparm
Is yours the turbo? IIRC Redline's 5w40 is quite heavy. Probably not the best (drop in MPG and power) but it would work.
I say you just sell the Redline.
Is this Fairy Tale Hour?
Please explain how 5W-40 "is quite heavy." If you are talking about the difference in viscosity between these two oils, please compare the viscosity values at specific oil temperatures. Most importantly, what is the viscosity of OIL A versus that of Oil B at common ambient start-up temperature and at the normal operating temperature. That's what's relevant.
Is yours the turbo? IIRC Redline's 5w40 is quite heavy. Probably not the best (drop in MPG and power) but it would work.
I say you just sell the Redline.
Is this Fairy Tale Hour?
Please explain how 5W-40 "is quite heavy." If you are talking about the difference in viscosity between these two oils, please compare the viscosity values at specific oil temperatures. Most importantly, what is the viscosity of OIL A versus that of Oil B at common ambient start-up temperature and at the normal operating temperature. That's what's relevant.
Originally Posted By: HTSS_TR
Buy 6 quarts Redline 5w-20 and mixing half and half with 5W40 to make 5W30.
I see, it's Fairy Tale Hour Part 2. Every oil base stock has different molecular weight. The resulting mix is not a chemical combination, it's just a physical one. Calculating viscosity the way you suggest is a mistake.
Buy 6 quarts Redline 5w-20 and mixing half and half with 5W40 to make 5W30.
I see, it's Fairy Tale Hour Part 2. Every oil base stock has different molecular weight. The resulting mix is not a chemical combination, it's just a physical one. Calculating viscosity the way you suggest is a mistake.
Originally Posted By: Tribeca
I have 6 quarts of redline 5w-40 oil from a previous Audi I used to own. I now own a 2011 Subaru Outback which specifies 5w-30 oil, but hate for the redline to go to waste. Thoughts?
Use the 5W-40 with confidence.
I have 6 quarts of redline 5w-40 oil from a previous Audi I used to own. I now own a 2011 Subaru Outback which specifies 5w-30 oil, but hate for the redline to go to waste. Thoughts?
Use the 5W-40 with confidence.
Are the 2011's like the previous model years that state 5W-30 is preferred for fuel economy and that 5W-40 is also allowed? Not sure if there would ever be a warranty issue with running a non-API certified oil. I don't think there would be a problem, but I thought that I'd throw it out there. The Subaru synthetic, made by Idemitsu, doesn't even show the API certification. I would use it.
I'm pretty sure there's a uoa or two on some n/a Subaru's on RT6 in the uoa forum. I've run conventional 10W-40 and Amsoil DEO 5W-40 in a '99 Outback.
-Dennis
I'm pretty sure there's a uoa or two on some n/a Subaru's on RT6 in the uoa forum. I've run conventional 10W-40 and Amsoil DEO 5W-40 in a '99 Outback.
-Dennis
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+1.
If the new engine is like the old one, as well as the old OM, Subaru allows the use of a wide range of grades and certainly a 5W-40 would be fine.
I'd run the Redine in warmer weather, and I'd feel bad running it less than the recommended 7.5K, assuming Subaru still recommends 7.5K or 7.5 months for the NA.
If the new engine is like the old one, as well as the old OM, Subaru allows the use of a wide range of grades and certainly a 5W-40 would be fine.
I'd run the Redine in warmer weather, and I'd feel bad running it less than the recommended 7.5K, assuming Subaru still recommends 7.5K or 7.5 months for the NA.
aren't the subies hard on oil anyway? if so, i would think redline 5/40 would be good for it...
Subaru I4 NA engines are fairly easy on oil and depending on the year I think 5w30 is the preferred oil. You are probably OK with a 40wt especially in hot weather but, one has to wonder about how it affect the VVT.
No effect on the VVT at all. Subaru has recommended up to 20W-50 in their VVT engines.
Subaru is not like all the other Bozos who can't engineer a VVT system that will work with a wide range of viscosities.
Ed
Subaru is not like all the other Bozos who can't engineer a VVT system that will work with a wide range of viscosities.
Ed
Originally Posted By: Eddie
Subaru I4 NA engines are fairly easy on oil and depending on the year I think 5w30 is the preferred oil. You are probably OK with a 40wt especially in hot weather but, one has to wonder about how it affect the VVT.
You could look up the viscosity of a sanctioned 5W-30 and that of the Red Line 5W-40 at, say 212°F, which is approximately normal operating oil temperature.
Subaru I4 NA engines are fairly easy on oil and depending on the year I think 5w30 is the preferred oil. You are probably OK with a 40wt especially in hot weather but, one has to wonder about how it affect the VVT.
You could look up the viscosity of a sanctioned 5W-30 and that of the Red Line 5W-40 at, say 212°F, which is approximately normal operating oil temperature.
I'm currently running Mobil 1 0w-40 in my '04 Legacy 2.5, seems to like it, runs smooth, no effect on mpg from previous 5w-30 run.
Originally Posted By: Volvo_ST1
Originally Posted By: Tribeca
I have 6 quarts of redline 5w-40 oil from a previous Audi I used to own. I now own a 2011 Subaru Outback which specifies 5w-30 oil, but hate for the redline to go to waste. Thoughts?
Use the 5W-40 with confidence.
+1. I am waiting for fairy tale hour part 3 anxiously.
Originally Posted By: Tribeca
I have 6 quarts of redline 5w-40 oil from a previous Audi I used to own. I now own a 2011 Subaru Outback which specifies 5w-30 oil, but hate for the redline to go to waste. Thoughts?
Use the 5W-40 with confidence.
+1. I am waiting for fairy tale hour part 3 anxiously.
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I would run it in my car in the summer time.
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