20-50 in riding mower

Joined
Sep 1, 2008
Messages
5,337
Location
Southeast Texas
Mom-in-law has a out of warrenty Poulan riding mower, and Father-in-law left over a case of O-Rielly 20-50. Could I safely utilize this weight oil in her mower? It is real hot where we live, and takes about 3 hours to mow the large yard, so I am thinking 20-50 might be fine for this... Opinions, please! Thanks.
 
Joined
Sep 8, 2005
Messages
15,218
Location
Canada
It'll work just fine. Might not be the ideal weight, but its free oil, and it won't hurt anything. I'd run it.
 
Joined
Sep 23, 2008
Messages
9,907
Location
Ontario, Canada
I would have no problems with 20W50 in a small engine in your climate. According to Suzuki 20W50 is OK down to 14F in a Vitara... Which I imagine has much tighter clearances than the motor in your mower. Ian
 

JTK

Joined
Aug 14, 2003
Messages
13,740
Location
Buffalo, NY
Yep. I agree with the above. 20w50 will do fine for 3hrs+ sessions of HOT Texas mowing. Joel
 
Joined
Jul 20, 2008
Messages
931
Location
Michigan
I ran 20W-50 Redline and 20W-50 M-1 V-Twin...both with amazing results from Blackstone...iron <2 and no copper or lead. Since then I switched to 15W-50 Motul 300V as my taste for Moly (867 ppm) and 1200 of Zinc is present in these products. I use 5W-40 Motul 300V in my winter equiptment. Again Blacstone showed "zero wear metals" with these oils. Motul 300V is a double ester product and the equiptment starts immediately due to amazingly low friction. I use either Amsoil or Motul now after much experimenting. The Amsoil EaO oil filters are amazing. I can hear it now...why such an expensive oil..... :)
 
Joined
Jan 6, 2005
Messages
7,550
Location
North Alabama
I'd use it. IMO, about the only way to hurt a small engine is running it without oil. As long as it has some type of engine oil in it, it will likely run for as long as you wish to keep it. Small engine failures are usually caused by something not related to oil, assuming the engine has the proper amount of oil in it.
 
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