Wideman, I see that you are a big proponent of the Chevron Delo gear oils. I did a search on your remarks and something is wrong. I see your posts listed, but when I go to open them up, I get a message that they can't be found.
Anyway, I have a '01 burb with Eaton style locking diff and am going to get the rear end fluid changed by a diff specialty shop. My manual calls for syn 75W-90, but this shop prefers the Chevron Delo 85W140 in all the diff that they rebuild. They claim that a lot of the syn break down or are just too thin. I disagree! I believe due to the CAFE standards in the US that they are using 75W-90 for fuel enconomy.
Bob talks frequently about the need for an oil that climbs up the gears and promotes Schaeffer oil. While I believe that it is good oil, I would like an OTS gear oil due to availabilty.
How does the Chevron Delo perform? Based on their product sheet, it appears that it is a very good gear oil. Do you know if it is a Group II, II+ or III base oil?
I talked to the rear end OEM, American Axle Manufucturer, and they claim that there is not any problem putting in 85W140 in their rear ends. They agreed with my opionion as to why all car OEM's are specing out 75W90. They even said that an 85W140 is preferred if you are doing a lot of heavy hauling and several customers of theirs, Fed Ex, specifically, changes out the factory 75W90 with 85W140 syn as soon they get the new trucks in.
Thanks in advance for your reply and comments.
Anyway, I have a '01 burb with Eaton style locking diff and am going to get the rear end fluid changed by a diff specialty shop. My manual calls for syn 75W-90, but this shop prefers the Chevron Delo 85W140 in all the diff that they rebuild. They claim that a lot of the syn break down or are just too thin. I disagree! I believe due to the CAFE standards in the US that they are using 75W-90 for fuel enconomy.
Bob talks frequently about the need for an oil that climbs up the gears and promotes Schaeffer oil. While I believe that it is good oil, I would like an OTS gear oil due to availabilty.
How does the Chevron Delo perform? Based on their product sheet, it appears that it is a very good gear oil. Do you know if it is a Group II, II+ or III base oil?
I talked to the rear end OEM, American Axle Manufucturer, and they claim that there is not any problem putting in 85W140 in their rear ends. They agreed with my opionion as to why all car OEM's are specing out 75W90. They even said that an 85W140 is preferred if you are doing a lot of heavy hauling and several customers of theirs, Fed Ex, specifically, changes out the factory 75W90 with 85W140 syn as soon they get the new trucks in.
Thanks in advance for your reply and comments.