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10w40 in winter?

10K views 24 replies 11 participants last post by  jimnolimit  
#1 ·
So I am running this oil: AMSOIL - SAE 10W-40 Synthetic Motor Oil (AMO)

I drive moderately sometimes hard, would this / could this be any issue?

I'm running this oil because I had some usage issues with oil when I last drained, was down about 2 quarts over 10k miles interval.
 
#4 ·
I run 10W40 Mobil Clean 5000 during the winter without any trouble.
 
#8 ·
I'm with jim. Should be fine as long as you let the car warm up a little longer and up to operating temp before doing any hard driving (I'm sure you probably do that anyway).
 
#12 ·
:wall: I start 'er up, wait about 30 seconds and then drive. I rarely have any time to wait 2-3 minutes for the car to warm the oil up. In those 30 seconds I check my e-mail on my phone and then I'm off to work. The car only needs so much time to build up oil pressure. It doesn't take that long.
 
#18 ·
ok, after doing more research, you're right, the SSO does claim a high mileage change interval, but thats under a limited set of circumstances. still, i would follow closer to the owner manual's recommendation and if i were looking to go more than 8k miles (regardless of the oil), i would do an oil analysis.
 
#23 · (Edited)
if you look at comparisons that people have made when cutting open filters you can tell which filter will work best (through common sense). people have measured how many square inches of filter material various brands use and pureolator is always one of the best. an oil filter with 50% more filter material will not only take longer to clog but it will allow a higher flow rate.

here is a good comparison: http://www.300cforums.com/forums/general-discussion/31190-oil-filters-dissected.html

^ if you look in that link, the pure one and bosch have the same amount of filter material which is also the largest amount of all the filters tested. the pure one and bosch had nearly twice the amount of filter material than the fram models and about 30% more filter material than the napa gold and mobil1.
 
#24 ·
WIX > All others IMO.