Hi,
I recently (29/5)posted this in the "Lawn and Small engine" area on here - it may be of interest;
STARTS
"Hi,
in the last few days I serviced two yard items that may be of interest
1 - A typical push Mower with B&S motor (no details)
The oil was originally changed when new after about 2 hours use - 10 years ago
Shell Helix Ultra 15w-50 synthetic was used and it has been there ever since and was changed two days ago. I think this mower would have done about 130 hours in that time - mostly in heavy going and dust and in temps between 10-40C
The drain plug was clean and a "torch search" showed that the engine's internals visible were very very clean
This motor has never consumed much oil having received about a 1/4ltr in 10 years
Shell Helix Ultra 15w-50 synthetic was used again
2 - Husky YT170 Ride-on mower - B&S "Intek", OHV pressure filtered engine
This mower was changed to Shell Helix Ultra synthetic 15w-50 with two hours on the hour meter when new in 1998
The oil was changed two days ago for the first time since 1998 at 92 hours. This mower is used in VERY dusty conditions, in very heavy going usually in temperatures ranging from 3C-40C
The engine's internals looked very clean and the filter was spotless when cut open
It has now been filled with Delvac 1 5w-40 and a new filter installed
In the three hours use since the change the engine sounds quieter, is smoother and appears to run a little cooler"
ENDS
I hope it is of interest!
Regards
Doug