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Old 01-24-2006, 04:39 PM   #1
WRXSleeper
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Default How bad is it to use 80w-90 in cold climates??

The dumbasses at NAPA sent over 80w-90 valvoline to the shop when i asked for 75w-90. I know i can use 80w-90, but living in NH it gets pretty cold in the winter. Is there going to be any negative effects from it being thicker in the cold with 80w-90.

They also dropped off valvoline syn power for the rear diff instead of M1 i asked for. Is that stuff ok?
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Old 01-24-2006, 05:35 PM   #2
Uncle Scotty
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Quote:
Is there going to be any negative effects from it being thicker in the cold with 80w-90.
...fergetaboutitalready.

Quote:
They also dropped off valvoline syn power for the rear diff instead of M1 i asked for.
....get the M1 if ya want.....the syn valvoline is ok
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Old 01-24-2006, 09:42 PM   #3
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Quote:
Originally Posted by WRXSleeper
Is there going to be any negative effects from it being thicker in the cold with 80w-90.
Like Uncle Scotty said no worries, I am running a modified uncle scotty cocktail using 85w90 hypoy c in NY and have had no ill affects. Just warm up the car and take it easy on the shifts until the tranny warms up and no worries.
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Old 01-25-2006, 08:08 AM   #4
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80W90 in the transmission in cold weather will feel like molasses until it warms up. I hated it with a passion. I switched to Syntech 75W140 full synthetic (available at Wal-Mart) and have been happy ever since - which is about 30k miles now.
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Old 01-25-2006, 01:24 PM   #5
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Synthetic is better for colder weather, but any GL5 rated tranny oil will work just fine. 75w-90 would have been a hair better. I assume NAPA was just being a cheap ass. I'd personally complain if someone put something other than what I asked for, especially a lower grade product. You could even argue that the 80w-90 doesn't meet our car's specifications(asks for 75w90). Still, in the overall perspective of things, it doesn't matter that much.

Oh wait, just read your post over again...did they already install this stuff or that's just what they ordered for you but hasn't actually been used yet? You're not real clear on this.

If nothing's been done yet, you can just say no to what they ordered for you. You don't have to be pushed into anything. Get what you want. All I can suggest is that you get a synthetic, a full synthetic, valvoline is a synthetic/dyno blend, not full synthetic. It will provide the best cold weather opperation. Any 75w-90 will work in the rear diff, dyno/synthetic, cheap/expensive, whatever. The tranny is a little more picky, particulary the syncros. The stock Subaru dyno works great till the temps drop. After that, a synthetic is benificial. A LOT of people here on NASIOC absolutely love Scotty's cocktail: 1 qrt Redline lightweight shockproof, 1 qrt GM Syncromesh, and topped off with a couple quarts of Castrol HypoyC 75w-90. Some people run full Redline heavyweight shockproof(heavyweight is the only version viscous enough to have the syncros work properly). GM Syncromesh is well liked in its own. Most any dyno or synthetic from just about every manufacturer will work just fine. Just stay away from Royal Purple, and people have had problems with Mobil 1's tranny fluid as well, but their engine oil is great...go figure. Valvoline is good, and I've used their products a lot in the past. I currently run Amsoil SevereGear in my tranny/rear diff with good results.
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Old 01-26-2006, 07:47 AM   #6
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^The oil is not in the car yet. My dad works at a tractor dealership so I had him get the oil and to save me a little money cause NAPAs normal prices are $$$. Local autoparts stores deliver parts to local shops for free and you buy it at a lower cost. I'm just going to return / exchange it for some 75w-90 valvoline when i have chance. I know they have it since I saw it there. My dad says I'd probably couldn't tell the difference in weight, but even the stock fluid feels thick and is harsh when cold and don't want to take a chance making it worse.
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Old 01-26-2006, 04:43 PM   #7
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...use 80w90 Castrol.....I didn't like that Valvoline in mine.

you will never even know that there was any difference in weight 75w90 to 80w90......and just adding some Synchromesh will help shifting action a LOT...really
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Old 01-26-2006, 07:00 PM   #8
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yeah, i wanted castrol, but they don't have it. i may just add a qt of synchromesh and return 1 bottle of 80w-90.
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Old 01-26-2006, 11:33 PM   #9
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Quote:
Originally Posted by WRXSleeper
yeah, i wanted castrol, but they don't have it. i may just add a qt of synchromesh and return 1 bottle of 80w-90.
^^^^^^^
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Old 01-27-2006, 09:11 AM   #10
WRXSleeper
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^found this on BITOG about synchromesh, has a reference to your "cocktail".

http://theoildrop.server101.com/ubb/...=001476#000004

I wonder how a qt of valvoline syn with the valvoline dino lube would do in the tranny. That way your atleast sticking with GL-5 fluids, but use the syn to make it fair a bit better when cold.
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Old 01-27-2006, 12:10 PM   #11
Uncle Scotty
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Quote:
Originally Posted by WRXSleeper
^found this on BITOG about synchromesh, has a reference to your "cocktail".

http://theoildrop.server101.com/ubb/...=001476#000004

I wonder how a qt of valvoline syn with the valvoline dino lube would do in the tranny. That way your atleast sticking with GL-5 fluids, but use the syn to make it fair a bit better when cold.

.....and THAT is why my 'cocktail' is what it is......ya gotta keep BOTH the trans gears and the R&P happy.......and why the Hypoy C and Shockproof are there....the synchromesh is for the trans.....the shockproof and hypoyc for both....and why only 1 qt of the synchromesh
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