I on my last oil change I switched to Mobil1 Tri-Synthetic 5W-30. I am about to change my oil agian. I was wondering if anybody was running the 0W-30 instead of there 5W-20 or 5W-30 recommended by Ford. I was also going to go to the NEW Mobil1 SuperSyn 0W-30. I would like anybody's opinon.

Thanks

 

I emailed Mobil when I bought my 2001 Supercrew. I asked them about using a synthetic, and about 5w20. They indicated that 0w30 was closest in viscosity to the 5w20 and that it would be a good substitute....better that 5w30. So, I went with it and have had no trouble in 9,000 miles....I change at 4,000

 

If you look at the reccomendations on the Mobil 1 web site, for Mobil 1 with "SuperSyn", they are marketing the 0w-30 for cold climates, 0w-40 for European engines, 5w-30 for newer vehicles, 10w-30 for higher-mileage vehicles, and 15w-50 for high performance vehicles.

I think the choice between 0w-30 and 5w-30 is a toss-up as long as you don't live in Alaska. Just my $0.02.

 

I agree, neither one will harm your engine.

How much more is that Mobil Super Syn?

 

I paid the same at Walmart as I used to pay for the old Mobil 1 - $3.74 / qt. Sometimes Walmart has the 5 qt. economy jug for $17.88 here in So. FL.

 

Same here up in MN. All Mobil 1 is the Super Syn now. Better stuff...same price.

 

I bought the 0W-30 and on the bottle it stated. "Enhanced Fuel Economy Formula". Also since that spec that Ford created for 5W-20 can only be achieved by 5W-20 oil could that standard have applied to only 5W-20 oil. In other words if you use a 5W-20 oil it must meet that spec? Hmmmmmmmm.

Thanks

 

mobil 1 is great oil. i have used it for years with great results. i don't remember whether AR is arizona or arkansas or what but if you live in a warm climate, you don't need 0W-30. 5W-30 might be better as it will hold its "warm" viscosity better. that is because the base stock is 5 weight and it takes fewer polymers to make it get to 30 weight when hot. the polymers wear out as oil ages. so i'd do 5W-30 for that reason.

 

I was under the impression that the higher the viscosity index number, the better the protection....

If you look at the specs for Mobil1 on their website, 0w30 has a higher viscosity index than 5w30 or 10w30.....

Interesting....................................... .

 

Viscosity Index is only useful in comparing oils of the same weight. So a 0w30 will have a lower viscosity index comparitivley than a 10w30.

To quote from the Lubrizol site:

As you see the comparison is between oils of similar kinematic viscosity

 

I am not sure I understand....

Are you saying that if 0w30 has a VI of 172 and 5w30 has a VI of 167, there is no comparison because they are different grades????

I guess I am confused, as it makes sense that a heavier oil would understandable have a higher VI.

I get the fact (I think) that if one 5w30 has a higher VI than another 5w30 that the first oil would provide more protection...

So how does one compare various weights to deterime the best oil for their application????