yep, an oil question, but for a lawnmower

[DeanR]

I have a bunch of partially full bottles from bikes... I ride much of winter.
Mobil 1 Turbo Diesel 5-40 Synth have been using this for quite a while in the ST
Rotella T6 5-40 Synth of course
Rotella T 15-40
Delo 400 LE 5-40 Synth
Delo 400 LE 15-40 Heavy Duty
Valvoline 4 Stroke Motorcycle Oil 20-50

Can I use these in my push mower?
Interestingly, this Troy Bilt mower (a freebie in great shape) says you never have to change the oil, only top off. Sure !
It's being changed.

 

[Larry Fine]

I wouldn't mix the dino and synth oils, but otherwise, yes, why not?

 

[ReSTored]

IMO 40 weight oil is a bit thick for a mower.

Any mower I've had listed 30w or 10w-30. I usually use 10w-30.

What does Troy Bilt say you should use?

 

[st11ray]

Most mowers use 30wt. Mixing synthetic and dino is no problem.

 

[SMSW]

Your mower has a splash oiling system - no pump, a finger on the crank 'wipes' thru the oil and splashes it around. I'm no expert, and I wouldn't use anything not spec'ed by the mfr in a warrantied mower, but out of warranty? Any of your oils should work fine.

Yes, my Troy built spec's 30 wt earl. And even though I don't have to do it, I usually change it annually

 

[Daboo]

Most mowers use 30wt. Mixing synthetic and dino is no problem.

+1

Any of your oils should work fine.

+1

Mowers don't care.

 

[SMSW]

I wonder what @beemerphile would say. IIRC his career was in lubricating oils.

 

[Catmandu2]

lawnmowers use oil ??

 

[Al st1100]

My craftsman brig/straton was about 10yr old and was leaking and burning oil a bit. I added 80/90 gear lube. It's over 20 years old now, Doesn't smoke or leak much since then. You can mix dino and synthetic. Use what you got, mix and match.