Mobil 1 increased consumption?
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Joined: Sep 2001
Posts: 87
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From: Baytown Texas
Mobil 1 increased consumption?
I purchased my '85 in July, and immediately changed to Mobil 1 10-30w. She doesn't smoke, but I've noticed a very slight puff on initial startup, indicating valve stem seal wear. The car has 89K on the odo now.
I just added a quart after the odo read 1222 miles since the changeover to Mobil 1. I wouldn't sweat this normally, but I drove the car 981 miles on the trip home after purchase and it used nothing on that trip.
Anyone else experienced higher consumption with synthetics?
I just added a quart after the odo read 1222 miles since the changeover to Mobil 1. I wouldn't sweat this normally, but I drove the car 981 miles on the trip home after purchase and it used nothing on that trip.
Anyone else experienced higher consumption with synthetics?
Racer
Joined: Mar 2001
Posts: 280
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From: Honolulu Hawaii
Re: Mobil 1 increased consumption? (Red85)
One thing with synthetic oil is that if your seals/gaskets are getting old (barely holding up with petro oil), then using sythetic may actually end up in leaks in the seals/gaskets. Sythetic oils are molecularly smaller than petro oils. You should plan on changing the seals/gaskets or just keep adding oil.
-Tim
-Tim
Le Mans Master
Joined: Dec 1999
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From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Mobil 1 increased consumption? (Red85)
Also will tend to clean up a little better, removing the 'gunk' that was helping seal old guides / seals. If it starting puffing only after several changes, then I would think the gunk clean-up was the case. If it started immediately, I would say that they were already done and it just showed up.
Seals are a pretty quick job as you probably know, guides take a little more work. If it was not maintained properly, it would be normal to have a seal / guide problem at your mileage.
Good Luck,
Pete
Seals are a pretty quick job as you probably know, guides take a little more work. If it was not maintained properly, it would be normal to have a seal / guide problem at your mileage.
Good Luck,
Pete
Instructor
Joined: Sep 2000
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Re: Mobil 1 increased consumption? (PeteL)
the synthetic will tend to wash away the "gunk" that was previously sealing leaks, especially around the valve stems. Synthetic has a higher flashpoint than dino, so it should actually burn less, tho may leak more- I've found on my vehicles that I get less oil consumption with synthetics.
Drifting
Joined: Jun 2000
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From: na
Re: Mobil 1 increased consumption? (Red85)
Not likely the "synthetic" base stock "cleaned it" but the different additive package. It's too late now. You might as well stay with the M-1. Synthetics do have a higher flash point than mineral oil base stocks of the same viscosity and also consequently a better Noack volitility test.
Oil is cheap. Besides you have not driven it enough to really have measured it.
Oil is cheap. Besides you have not driven it enough to really have measured it.
