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Poking around on the web, I came up this posting on a minivan forum:
"Chrysler went into bankruptcy using Mobil and emerged using Pennzoil, likely Fiats doing. Mobil has been avoiding meeting the standard MS 6395, via tests, pretty well since then except for their Mobil 1000 conventional oil."
So that may be the explanation regarding Mobil 1. I have also heard tell that oil companies have to pay a spiff to the OEMs to advertise that their products meet the OEM specs. Doesn't mean the product is any different, better, or worse. It just means that somebody doesn't want to cough up the dough.
For a normal duty cycle, or an extreme duty cycle, I just can't see that much benefit to Mobil 1. The only time it's going to protect you from failure is at crazy long service intervals, which you know I'm not a fan of anyway. YMMV.
"Chrysler went into bankruptcy using Mobil and emerged using Pennzoil, likely Fiats doing. Mobil has been avoiding meeting the standard MS 6395, via tests, pretty well since then except for their Mobil 1000 conventional oil."
So that may be the explanation regarding Mobil 1. I have also heard tell that oil companies have to pay a spiff to the OEMs to advertise that their products meet the OEM specs. Doesn't mean the product is any different, better, or worse. It just means that somebody doesn't want to cough up the dough.
For a normal duty cycle, or an extreme duty cycle, I just can't see that much benefit to Mobil 1. The only time it's going to protect you from failure is at crazy long service intervals, which you know I'm not a fan of anyway. YMMV.