Synthetic 10W30, HDEO 5W40 or Straight 30 wt oil?

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Originally Posted By: tig1
Originally Posted By: Panzerman
I use 15w40 HDEO in my generators. Alot of people on here have way to much trust in multi weight car oils. I went out at night and saw the muffler glowing orange. Although the fan of the recoil blows air on them. They get plenty hot. The only time a multi weight car oil matters is at start up. Usually a generator is started and let run at a pretty constant speed. I would use a straight 30HD or 15W40. Both are tough oils. I would not see the reason to use a 5W30,10W30 or even 10W40 oil in a generator in Florida.


Why do you use a multi wt oil then?


He's using either a straight grade (30) or a multi-viscosity HDEO (15W-40). He said his issue is with "multi weight car oils", and even listed the ones he suggests not using, and doesn't use himself (5W-30, 10W-30, or 10W-40).

I generally agree, but I do use 10W-30 Rotella T5 in my stuff (an HDEO).
 
Mobil 1 TDT 5w-40 in my 26hp Briggs on zero turn since 2007. Same in my 5K Excel generator and Kawasaki Prairie 650.
 
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