ok66

Received this mobil 1 email today - to share

http://msg1svc.net/servlet/Pv?c=703d...30267469643d30

Looking for ways to improve fuel economy? Consider switching to a lower viscosity motor oil.
If your vehicle uses a 10W-30 or a 5W-30 oil, consider Mobil 1 0W-30 Advanced Fuel Economy.

Thoughts?

User 82021

toyota has been doing this for a while, most of the newer toyotas are 5w-20 and some are 0w-20

tsslaporte

Its still a 30weight when hot, so its still the same or similar to what you have, I am pretty sure you wont see much of an improvement.

300hp V8 isn't bought for mpg so its a moot point. But try it out if you like and report back. If it meets the proper specs no problem.

jbraswell

I switched to this oil this weekend and tank avg (even in city driving) started increasing throughout the day. Good stuff so far. I recommend everyone give a try and post some feedback.

tkbalt

I just switched to this in my LX - every little bit helps. Wish I could get the mileage I used to get on the LS. The LX is a pure gas hog.

Buy it at Wal Mart - cheapest place I have found it.

Marklouis

gotta love bob!

http://www.bobistheoilguy.com/motor-oil-101/

Ty419

Oil with moly in it has been shown to increase mileage in measurable quantities. It isn't recommended for all applications for some reason, I forget why, but there are a few brands that use it in their long-life formulas. It is standard for motorcycles, though, and it is difficult to find oil without moly.

jbraswell

I am not sure how much moly is in this oil, but it is the new API "SN" formulation, which is centered around increased gas mileage.

Ty419

The new generation of "fuel economy" oils have upwards of 100 PPM of molybdenum, which is why they can increase fuel mileage in some cases. Some "old" oil already has moly in it, and those users will notice no difference in mileage since the oil is already "slick." Anyone that has ever bought motorcycle oil for a bike with a wet clutch knows all too well the effects of moly.

The weight is misleading and has nothing to do with the fuel economy, as the 0-30, 5-30, and 10-30 are all 30-weight oil at operating temperature, which should comprise most of your driving if you care about mileage. The first number is the cold weight, which only helps on startup.

There is some fairly widespread concern over some of the new "fuel economy" oils, as some have pretty significantly reduced levels of phosphorus and zinc, which are the primary high pressure lubricants. I'd make sure you know exactly why you are switching oils before grabbing the latest marketing scam off the shelf.

jbraswell

Well, a couple points of why I have confidence:
1) This is Mobil 1 oil- probably the best oil brand on the market and a company that spends millions of dollars on R&D
2) Toyota recently switched to 0w-20 oils for most of their newer models. That is lighter than this 0w-30 oil. Toyota is also a big proponent of 0w oils, as they have a superior 0w-20 sold in the market.

If I was putting a 20weight oil in my car to achieve better fuel economy, I would be concerned. With this oil, I am still following the Lexus recommendation by using a 30 weight oil. This oil provides better startup protection and helps decrease engine wear by allowing the oil to flow to critical engine areas faster, especially as the temps drop over winter season. Here is a link to the mobil site with additional info:
http://www.mobiloil.com/USA-English/...l_Economy.aspx

I was a skeptic also until I tried the oil. I would say this is as good of an oil technology breakthrough as developing the 5w-30 oil to replace the 10w-30 oils going from dino oil to synthetic oil.

Btw- I recently found out Mobil is the mfg of Toyota oils.

campisi

I will be moving to this oil on my next change. 0W-30 most likely won't improve gas mileage noticeably, if at all, but I think it will reduce engine wear at cold start.

FYI - I recently bought a 2011 Subaru Forester (for backcountry camping / skiing trips) that specs 0W-20.

Jabberwock

I have read that it takes up to 30 minutes for your engine oil to come up to full temperature, so for folks in colder climes that drive lots of short trips, a 0w30 oil could provide decent MPH improvement and save on cold start wear and tear.

V8_Fan

I still use M1 0w40...best consumer grade M1 out there (otherwise, M1 Delvac 5w40 is slightly better, but $$$...like $35/gal wholesale). Here are the recommendations for the 0w30. Note that it's ACEA A1/B1 (Ford/GM).

ACEA A1/B1, A5/B5
API SN,SL,SJ
ILSAC GF-5
Ford WSS-M2C946-A


According to ExxonMobil, Mobil 1 0W-30 Advanced Fuel Economy is of the following quality level:
Ford WSS-M2C929-A
General Motors GM 4718M
General Motors GM 6094M
API CF

Typical Properties

Mobil 1 0W-30 Advanced Fuel Economy
SAE Grade 0W-30
Viscosity @ 100ºC, cSt (ASTM D445) 10.9
Viscosity, @ 40ºC, cSt (ASTM D445) 62.9
Viscosity Index 166
Phosphorous (ASTM D4951) 0.065
Sulfated Ash, wt%, (ASTM D874) 0.9
HTHS Viscosity, mPa•s @ 150ºC (ASTM D4683) 3.0
Flash Point, ºC (ASTM D92) 226
Pour Point, ºC (ASTM D97) -50
Total Base Number (ASTM D2896) 9.1
MRV @ -40 ºC (ASTM D4684) 13,250
Density @15.6 ºC, g/ml (ASTM D4052) 0.842


Now here is the recommendation for the 0w40:

API SN/SM/SL/SJ X
ACEA A3/B3, A3/B4 X
Nissan GT-R X



Mobil 1 0W-40 has the following builder approvals: 0W-40
MB-Approval 229.3 X
MB-Approval 229.5 X
BMW LONGLIFE OIL 01 X
VW 502 00/505 00 X
PORSCHE A40 X



According to ExxonMobil, Mobil 1 0W40 is of the following quality: 0W-40
API CF X
SAAB X
OPEL Long Life Service Fill GM-LL-A-025 X
OPEL Diesel Service Fill GM-LL-B-025 X
FIAT FIAT 9.55535 - M2 X
FIAT FIAT 9.55535 - N2 X
FIAT FIAT 9.55535 - Z2 X


Typical Properties

Mobil 1 0W-40 Value
Viscosity, cSt (ASTM D445)
@ 40º C 75
@ 100º C 13.5
Viscosity Index 185
MRV at -40ºC, cP (ASTM D4684) 31,000
HTHS Viscosity, mPa•s @ 150ºC, (ASTM D4683) 3.8
Total Base Number (ASTM D2896) 11.8
Sulfated Ash, wt% (ASTM D874) 1.3
Phosphorous, wt% (ASTM D4981) 0.1
Flash Point, ºC (ASTM D92) 230
Density @15.6 ºC, g/ml (ASTM D4052) 0.85

Note that the 0w40 meets specs for Porsche and the Nissan GTR while the 0w30 is good for Ford/GM. At 100C, the viscosity of the 0w40 is higher (13.5 vs. 10.9) and the total base number (TBN) is 11.8 vs. 9.1. This is 30% MORE additives (what gets used up to neutralize the acid from the water in the oil created by short trips [when the oil isn't hot enough to evaporate the water, thus forming acid as a byproduct that must be neutralized by the additives in the oil]) in the 0w40 vs. the 0w30. The TBN is basically a measurement of the life span of your oil, so given you drive the same short trip using 0w30 vs. 0w40, the 0w40 will give you 30% more short trips per change. Does the 0w30 increase your fuel economy by 30% over the 0w40? I doubt it. Given the same price, the 0w40 is a no-brainer. Only if the 0w40 costs 30% more than the 0w30 would the 0w30 be the better choice (assuming you change the oil yourself, so there's no increased frequency of dealer labor).

Marklouis

Interesting research! a good tidbit to add to my Oil vocabulary.

jbraswell

The 0w-40 is no doubt an awesome oil. I believe all Euro cars are designed with a xw-40 oil to begin with. This is the reason you see the MB, BMW, VW, Porsche, etc... approvals. xw-30 oils are designed for the USA market and manufacturers. I will not get into assumptions of why, but I know that Lexus/Toyota has recommended a xw-30 oil for the 3UZ engine and I would not stray from this OEM recommendation.

For this reason in your quote:
"At 100C, the viscosity of the 0w40 is higher (13.5 vs. 10.9)"

When the engine is at high temp the 40 weight oil is 30% more viscous and this could potentially keep the adequate amount of oil from flowing to the critical engine parts (i.e. bearings).

Because these are very robust engines, I think you will be fine to run the M1 0w-40 oil and I second that it is one of the most outstanding oils on the market. However, I don't think you or I know more then Toyota about what or why an oil is specified and I personally would not go against that recommendation.