I'm on vacation in the states for my son's wedding, so after 28 hours of broken planes and hotels, I'm back on line.
Delo Gear Lube (automotive) and Ultra Gear Lube (industrial) are ISOSYN base oil, Borate EP products with 75 lb timken tests. I personally sold a sugar mill on replacing Meropa 680 that they traditionally ran 2600 hours with about 700 ppm of iron, running about 60 C. At the end of each season (5200 hours)they spent 4 months replacing and refacing gears. The Chevron Ultra Gear 680 they put in ran through all of last year ended the 5200 hours running at 45 C and 7 ppm of iron, so I told them there was no need to change oil. So far this year they are about 4500 hours into the season on last years oil, still running 45 C. We will analize at the end of the season. This means they are using 4,400 liters for 2 years and so far no repairs instead of 22,000 liters in two years with a lot of repairs.
Also, 20 months ago I convinced two owners of interstate busses to convert from traditional sulfur/phos 85w140 gear oil in their Volvo transmissions. The four busses were running 86 to 94 C in the transmission (laser gun). Because of the heavy loads, steep mountains 12% grades) they never had gotten more than 40,000 km without a transmission rebuild. We switched to Delo 80w90 in Jan 2001, and dropped temps to 55 and 56 C. I asked them to give me samples at 50,000 km for analisis, but they now tell me they don't want to drain the oil and bother with analisis since each bus has now gone over 140,000 km without a repair. This was not only an oil change but a visc change, as I took advantage of the fact that I was guaranteeing their transmissions to get them to the right viscosity as well.
I also run Delo in the race cars I sponsor. After one race I had the trans opened just for inspection to prove to the other drivers the difference. The demonstration worked, but the photografer didn't.
I have some additional information on my site...... for those that understand a little spanish.
