From: SMS on
Mark A wrote:
> "SMS" <scharf.steven(a)geemail.com> wrote in message
> news:46192025$0$27242$742ec2ed(a)news.sonic.net...
>> Is the Extended Life a true synthetic with group IV base stock? I know
>> that for a while Mobil made their racing oil available to consumers, and
>> that was a true synthetic, but they no longer do this.
>
> Yes, the Mobil 1 Extended Life is a true synthetic with group IV base stock.
> It costs a little more than regular Mobil 1. However, if you change your oil
> every 5000 miles for warranty purposes, then I would not use it because it
> is not an "energy saving formula."
>
> Mobil 1 Racing Oil contained zinc and phosphorus, and is (was) not suitable
> for street legal car (it will damage your emissions system). They originally
> sold it to consumers because of the large number of small track drivers that
> wanted it, but they did not realize that people would be stupid enough to
> put it in a street legal vehicle.

I wonder if any people are using the Amsoil products with the added ZDDP
(non-XL-7500) in street legal vehicles?
From: Noozer on

"Mark A" <nobody(a)nowhere.com> wrote in message
news:bKKdnedkKssByYTbnZ2dnUVZ_sGqnZ2d(a)comcast.com...
> "Noozer" <dont.spam(a)me.here> wrote in message
> news:MTaSh.45353$6m4.32747(a)pd7urf1no...
>> What makes an oil "energy saving"? If I put two oils of the same grade
>> side by side, where one was energy saving and the other not, what
>> difference would I find?
>
> The energy saving formula would produce better gas mileage.

If the grades are the same, then they should thin similarly. Oil is slippery
regardless of what you put in it. What is it that would make Mobil 1 EP 5w30
not energy saving, but Mobil 1 5w30 would be?


From: Eeyore on


Mark A wrote:

> Mobil 1 Racing Oil contained zinc and phosphorus, and is (was) not suitable
> for street legal car (it will damage your emissions system). They originally
> sold it to consumers because of the large number of small track drivers that
> wanted it, but they did not realize that people would be stupid enough to
> put it in a street legal vehicle.

The Mobil 1 sold in Halfords isn't the racing oil though.

Graham


From: Eeyore on


Noozer wrote:

> What makes an oil "energy saving"? If I put two oils of the same grade side
> by side, where one was energy saving and the other not, what difference
> would I find?

The SAE grade merely measures viscosity. That's just one side of the coin.

Graham


From: Mark A on
"Noozer" <dont.spam(a)me.here> wrote in message
news:1AdSh.45578$6m4.23670(a)pd7urf1no...
> If the grades are the same, then they should thin similarly. Oil is
> slippery regardless of what you put in it. What is it that would make
> Mobil 1 EP 5w30 not energy saving, but Mobil 1 5w30 would be?

Are you asking, or telling us?

Ask the API who tests oil and issues the Energy Conserving designation (I
previously said energy saving, but the official designation is Energy
Conserving).