dirtcheap
08-27-2008, 12:32 PM
i am currently running royalpurple 15-w40 oil and am wondering what the benifit to running the 5-w40 is...im in north florida where the temps dont dip below freezin that much...:confuzeld thanks
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Horsehaulin 08-27-2008, 12:57 PM Moved: Maintenance & Fluids Heath 08-27-2008, 07:39 PM If the two products have the same API rating, then you probably wouldn't see much advantage where you are. Diesel52 08-27-2008, 11:43 PM Two answers here. Syn oils will take heat and cold better then conventional oils. They resist thermal break down better. They are about 9% slipperier then conventional oil. Who's ever oils you like they should provide you with a booklet about there oils ( Product books) I have several ones that are current and use them as sitting reading.:D Before I started using Syn oils I collected about 1 1/2" binder full of papers and info from Mobil and SAE. I still think of the gent that I talked to, he forwarded me more info that I hadn't thought of! Thank You Sir! The info that you gather will give you the ideas for your preventitive maintence.:D strykermom 08-28-2008, 02:57 PM I live in Fairbanks Alaska wher temps get to 50 below, and the syn oil seems to do better. I LOVE MY Silverado 2500 HD shadowm 08-28-2008, 05:58 PM According to Amsoil's web site, 5W-40 is only recommended (i.e., necessary) for '07 and newer diesels. 15W-40 is recommended for pre-'07 diesel engines. dirtcheap 08-28-2008, 06:26 PM strykermom what viscosity oil do you use up there...i would the thinner the better . | ||