Trouble finding a good 10w40 full synthetic oil.

F

Fastrak1972

Member
Owners manual calls for 10w40 but 10w30 is acceptable within certain temps. I've seen the Kawasaki oil but it is semi-synthetic and most other 10w40 full synthetic is of the high mileage variety. And other Full synthetic oil of 10w40 is motorcycle specific. I'm not sure either of the Motorcycle or high mileage is suitable for lawn mower use. So I'm thinking of just using 10w30 if I can't find 10w40.. Can anyone here tell me what they are using.
 
There’s nothing wrong with a semi-synthetic oil. The Kawasaki oil has high levels of zinc and phosphorus and better for your air cooled engine than regular automotive engine oil.
Some 15W40 heavy duty diesel oils have high zinc and phosphorus content. Shell Rotella T5 and Motorcraft Super Duty are two that stand out. Mobil 1 15W50 is a full synthetic that has high zinc and phosphorus content.
Kawasaki also allows for 20W50 in extreme temperatures.
In the end, it doesn’t really matter if you use conventional, semi-synthetic, or full synthetic oil. What counts is regular oil and filter changes along with good air filter maintenance.
 
You can get 4 qts full synthetic Shell Rotella 5w-40 at any big box store for $30. Should be more than sufficient if that is what your inclination is.
 
Hi-mileage oils have ingredients in them to swell oil seals & over time the seals harden & leak....

I won't touch them , that's for sure..
 
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