Gernerac 3250 small generator

Messages
484
Location
IL
Time for my first oil change, what shall I use? Manual says 30w or 10w30. Rotella T5? Mobil 1 HM 10w-30? I thought I read one time that these engines have unusually hard internal surfaces..
 
Messages
12,925
Location
Northern Kentucky
Either of your choices are fine, the T5 is more economical, but if you have enough OPE, buying a jug of M1 HM 10w30 goes a long way. Either way is miles ahead of the mineral SAE 30 you will find with antiquated API ratings. There are plenty of good SAE 30s, like Pennzoil or Valvoline.
 
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