So I'm debating if I should stick with synthetic 15w40 or go with synthetic 5w40. I do live somewhat close to Chicago. It has gotten below zero at times during the winter. What's everyone's opinion on this before I order my oil.
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So I'm debating if I should stick with synthetic 15w40 or go with synthetic 5w40. I do live somewhat close to Chicago. It has gotten below zero at times during the winter. What's everyone's opinion on this before I order my oil.
Age old question ... yet very a important one.
I vote for 5w-40 full synthetic. Actually its all I ever use since my truck needed the 1st oil change ... and very very happy with it.
Jim
2006 ~ 2500HD, Big Horn Edition, 5.9, 4x4, Q/Cab, 48RE, L/B, 3.73, S&B CAI & Snout, ProFlo 5" S/S exhaust, Smarty Touch, Oil ByPass Kit, 60 gal main tank, 110 gallon in-bed tank, XX-Fuel Filter System, Coolant Bypass Kit, Mag-Hytec front & rear end covers and trans pan, 285 x 70 x 17
"Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children’s children what it was once like in the United States, where men 'were' free." ~ Ronald Regan
I use Delo and replace one quart of oil with one of gear oil.
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