Originally Posted by Red-Stripe
I was hoping it wasn't something pedestrian like that.
I know you don't value my wisdom, but I'll give it anyway:
The friction bearing surfaces of a vehicle's engine, tranny and rear end should be designed and assembled to run with AVERAGE quality lubricants. In the expectation of racing, or harsh above normal loads, the design would include at least: increased clearances for thermal growth, increase contact bearing areas, and of course heat dissipation. Anyone running a race car or other high load vehicle that has success either understand this or plain got lucky.
I'm curious, In what fashion did Mobil concede to you that they sold a defectively designed product? Can you share?
I called their customer service line and asked how I would go about filing a claim for their product failing. Got the run around for about a day then got connected with a customer satisfaction rep. My axle builder wrote up his report (he is ASE certified Master Mechanic) and then Mobile asked me to send the lot number of the oil I used. I still had a bottle from the case (the axle had only a few hundred miles on it). I was then asked to have it taken to a third party of which we agreed on (another highly recommended shop not to far from me) and they came to the same conclusion. At this time the oil sample report came back from the lab and I included that as well. I got a call back about three days later stating they would pay for my original builder to rebuild the diff.
All in all it was a wash, the amount I spent towing the rig around was about what a rebuild would have cost. They never "admitted" fault, but they did pay for the rebuild. At this point I was actually excited as it seemed they stood behind their product, which is why I used it again. When the second one failed for the same reason I took it to a completely different shop to get a completely unbiased opinion. They came up with the same diagnosis. I weighed the thought of going for round two, but decided after the first time that I would still be out the cost of a rebuild just going from shop to shop.
As for the jeepspeed, you are right on with the engine build advice, but rules say the engine must be stock (well at the time they did, they now allow some bolt on mods) and they will tear them down occasionally. Its all about keeping the cost competitive as the average guy is supposed to be able to get into it for $5-8k including a vehicle and modifications (cage, suspension, safety equip. etc.)