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0w20 vs 5w20 in hot weather Which oil is better for hot weather like in Florida interesting thing is that this hyundai in other countries manuals says to use 0w20, 5w20, 5w30, 10w30 and 0w40, all depending on temps car will be in. In usa they want you to use 0w20.

FormulaShell Full Synthetic I could not find any info on what type of oil this is. Group III or IV It's being sold at ----'s for 19.99 a six pack. Anybody have any idea what type of oil this is? There are no VOA on this oil either.

What your thoughts about using Castrol Syntec 5w-50 oil in my 2005 HD Dyna Glide for cold weather. Only reason for me asking is that the current oil which is Mobil V-twin 20w-50 is too thick for the freezing temps. It's sluggish when it starts and I don't want to ruin the engine. I know 5w-50 is...

Why does does my oil pressure drop at idle after the engine temperature starts to reach 225 degrees F? At normal speeds the pressure is about 45-50 psi and at idle when hot its about 25 psi. When cold the pressure is the same as normal speed. The oil pressure at idle is fine if the engine temp...