Posted by Geo-TH,In on September 30, 2018 at 15:43:58 from (184.19.60.218):
In Reply to: 30 wt oil or 15-40 posted by 37chief on September 30, 2018 at 14:11:06:
Here is my take, the first number is for when it's cold. New cars are requiring 5w20 or 5w30. I want my first number to be 5 so on cold starts the oil flows faster through filter and Oil flows faster to lubricate engine. Not sure if the 13 hp honda has a filter. I gave the 13 hp pressure to my boy. I've always used 10w30 or 10w40 in my mowers, tractors , pressure washers. Kaw mule calls for 10w40.
I have switch my generators over to 5w20 full synthetic. Easier to start if very cold weather. Use 10w30 full synthetic in my Ford Jubilee 20 hp Honda. It does have a filer.
The hydraulics on my old terramites called for 10w30 or 10w40. Newer terramites say you can use 15w40 in summer. As for me I recently changed hydraulic oil and used 5w30 synthetic blend. I like the way hydraulics work on cold start ups. Hydraulic shop told me oil gets hotter if it can't flow freely to the pump.
Use what the book calls. I would also say what some can use depends on their climate.
All my old GM cars and trucks call for 5w30 oil. New car calls 5w30 dexos and they claim it goes 6k on oil change.
So my personal preference is using 5w or 10w, not 15w oil in gassers.
Can't really say I've ever had an oil related engine problem. I'm pushing 70.
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