Actually the taxi test is pretty good because there is a lot of idling and
stop and go driving. Far more severe duty than driving under a constant
load. Also I challenge you to find another OBJECTIVE test that has been
done that shows any measurable difference in engine wear for using a
synthetic......................Just for arguments
sake.....................Cheers Henry Morrison
-----Original Message-----
From: William Eastman <william.eastman@medtronic.com>
To: mgs@autox.team.net <mgs@autox.team.net>;
autox.team.net.mgs@eos.medtronic.COM <autox.team.net.mgs@eos.medtronic.COM>
Date: Sunday, March 07, 1999 8:03 PM
Subject: More Mobil 1
>I use 15W50 which has, I believe, a red cap. I also agree with whoever
>said that the taxi test probably wasn't the best test since taxi engines
>run for long periods of time at relatively low loads. In this type of use
>any modern oil would be sufficient. I would bet that, if enough miles had
>been covered, the synthetic using engines would have been cleaner inside.
>
>I read somewhere that Pennrite is marketing an oil for classic cars. I
>don't quite understand this. The older engines, with their larger
>clearances, need a heavier oil but modern oils are available thicker so I
>can't imagine what the advantage would be. I suppose if you changed a car
>from non detergent to the heavy detergent modern oils you could have some
>trouble but otherwise, I would use the latest oil available. Few things
>have improved in the last 30 years as much as oil.
>
>BTW- the main driver for modern cars using thinner oil is fuel economy. If
>you feel brave and want to improve fuel economy, try running thinner oil.
>The car would run a little cooler as well. No guarantee on your rod
>bearings surviving.
>
>Regards,
>Bill Eastman
>61 MGA full of 15W50 Mobil 1or at least it was when it was stored.
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