I recently had a truck trans and rear ends serviced and opted for the Chevron ESI Lubricant due to the reduced cost compared to the true synthetics.
On examination of my receipt I notice they show filling the trans with the Chevron ESI GL-5/MT-1 rated 80W-90 hypoid axle lubricant instead of the ESI SAE50 GL-1 Transmission Lubricant .
The Transmission is a 1650 torque rated Rockwell/Meritor 10-Speed that calls for GL-1 rated Non-EP SAE50 transmision lube.
Chevron claims that both ESI fluids contain EP additives that do not attach soft metals.
Looking at the data sheets shows the viscosity of the two lubes is essentially the same at 40C and 100C. I really dont understand how this is possible unless transmission and hypoid gear oils are measured against differant standards?
Is this anything to worry about?
Should I change immediately?
100,000 mi?
250,000 mi?
500,000 mi?
ESI GL-5 80W-90 is rated for 500,000 mi in the rear axles (Meritor Approved).
ESI GL-1 SAE50 is rated for 500,000 mi in the transmission (Meritor Approved).
Gene
On examination of my receipt I notice they show filling the trans with the Chevron ESI GL-5/MT-1 rated 80W-90 hypoid axle lubricant instead of the ESI SAE50 GL-1 Transmission Lubricant .
The Transmission is a 1650 torque rated Rockwell/Meritor 10-Speed that calls for GL-1 rated Non-EP SAE50 transmision lube.
Chevron claims that both ESI fluids contain EP additives that do not attach soft metals.
Looking at the data sheets shows the viscosity of the two lubes is essentially the same at 40C and 100C. I really dont understand how this is possible unless transmission and hypoid gear oils are measured against differant standards?
Is this anything to worry about?
Should I change immediately?
100,000 mi?
250,000 mi?
500,000 mi?
ESI GL-5 80W-90 is rated for 500,000 mi in the rear axles (Meritor Approved).
ESI GL-1 SAE50 is rated for 500,000 mi in the transmission (Meritor Approved).
Gene