Interesting Mobil 1 15W-50 and 0w-40 statements.

[cangreylegend]

http://www.daliracing.com/v666-5/info/article_read.cfm?articleID=168

 

[vvk]

Just remember that this view is very Euro-centric. Their xW-30 choices are severely limited and great majority of motor oils on the market are xW-40.

 

[jason07-1zzfe]

We saw this already. That guy isn't technical anything, he should be in marketing. This is a complete line of BS: "The product is the nearest you can get to the oil used in Formula 1 and the Indy car series. The viscosity spread of 15w to 50 is naturally achieved so the product cannot shear down with excessive use (this is why bikes with integral gearboxes and clutches like it)"

 

[Eiron]

Nice Brazilian lube ad he's got listed under "Other Articles"...

 

[Patman]

On the subject of Mobil 1 15w50, I thought you guys might be interested in this quote from a friend of mine who has a nice 1978 Trans Am with a real nice 455ci motor he had built for it:

quote:

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FWIW - my motor (a 1971 455) was broken in with 14 full throttle runs on the dyno using 10W30 oil (changed 3x). From that point on my builder recommended that I run 10W40 or 15W50 synthetic to maintain good constant oil pressure at all rpm as the motor was built with larger main bearing clearances than factory 455's. These motors have very large main bearings (3.25") which means a high bearing speed and lots of heat build up. Most 455s never see the high side of 4000 rpm in passenger cars, once you start to twist them for more power you have to keep the heat off the bearings. As a point of interest - when we changed to Mobil 1 15W50 for the last dyno pull we lost 10 hp.

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[G-MAN]

quote:

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Originally posted by Jason Troxell: We saw this already. That guy isn't technical anything, he should be in marketing. This is a complete line of BS: "The product is the nearest you can get to the oil used in Formula 1 and the Indy car series. The viscosity spread of 15w to 50 is naturally achieved so the product cannot shear down with excessive use (this is why bikes with integral gearboxes and clutches like it)"

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Actually, that's the one line of his I found to be quite accurate. Mobil claims that the Penske team uses OTC 15w50 in their race engines. And a 15-50 spread without VI improvers is quite possible, indeed likely. (As is the 10-30 spread of Mobil 1 10w30.)

 

[buster]

I think many underestimate the technology ExxonMobil has. Is there hype behind some of it? Probably, just like any other oil brand. I will say though that with a company that large, they most likely have the best of the best in terms of technology and chemists.