I am changing my lower unit oil on my 250 pro xs and wanted to know if using the 75w-140 is good for this. I have always used royal purple but wasnt sure if 75w-90 or 75w- 140. I figure the only difference is the amount of heat tolerance.
I am changing my lower unit oil on my 250 pro xs and wanted to know if using the 75w-140 is good for this. I have always used royal purple but wasnt sure if 75w-90 or 75w- 140. I figure the only difference is the amount of heat tolerance.
I do not recommend ANY lubricant other than Mercury/Quicksilver HIGH PERFORMANCE gear lube.
This lube is a SYNTHETIC lubricant, with emulsifiers added to help protect your gearcase in the event of water intrusion.
Any other lubricant should be considered "test at your own risk".
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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