Comments on: Synthetic Oil – Does It Increase Gas Mileage?

By: XtatiK

XtatiK — Tue, 21 Dec 2010 22:20:00 +0000

you can also do ping -a

By: Herman

Herman — Sat, 10 Apr 2010 15:55:27 +0000

I have always run full synthetic oils in all of my vehicles including my Harley, not just in the engine but, the auto transmissions, transfer boxes, manual transmissions and differentials, since they were new. The mileage increase is all based on how one drives and where.

Synthetic oil was developed for airplane engine application, during WWII due to the lack of petroleum and most importantly their ability to maintain their properties during extreme temps being generated by these engines.

When petroleum oil breaks down the lubrication properties become none exsistant. This fact, causes severe damage to all moving parts, as this happens you achieve a higher amount of friction than the components were designed for and therefore loss of fuel economy to what ever degree.

All of this being said and better fuel economy being what everyone is seeking, the most important issue at hand is the longivity of the component(s) being lubricated. By reducing friction, all of the moving parts will have a greatly increased life and certainly less mechanical failure.

In closing I will point out acheiving greater fuel economy is directly affected by how one keeps up on the maintenance (air and fuel filters, proper oils changing intervals, tire pressure) and the final key factor KEEP YOUR FOOT OUT OF IT!

By: Anthony Cox

Anthony Cox — Mon, 08 Feb 2010 13:55:10 +0000

CORRECTION, I meant CRUD, not crude…

By: Anthony Cox

Anthony Cox — Mon, 08 Feb 2010 13:53:23 +0000

I get about 1-2% better gas milage with synthetic, but that does not cover the high cost of synthetic oil.

Your 1mpg is a poor comparison, since a car that only gets 10mpg, will get 10% more gas milage at 1mpg with synthetic oil, which is simply not true.

Synthetic oil does not have a longer life. Oil builds up moisture in it, and uses up its detergent additives. Only changing the oil fixes that problem. The moisture is a byproduct of combustion, and dilutes the oil. The longer you have that oil in your engine, the more moisture accumulates.

The reason oil gets dark, is because the detergents in it are working, disolving the crude. The only way to get the dissolved crude out, is to change the oil.

I love Mobil 1, but the claim of being able to go 12,000 miles between oil changes may void your engine warranty, and is an irresponsible statement. Anyone who believes it should ask Mobil Oil if any automobile manufacturer will back their claim.

There are some errors in your “article/question”.

“You will see less than 1 mpg difference and you may not see any negligible difference.”

It should say:
“You will see less than 1 mpg difference and you may not see any NOTICABLE difference.”

If you want better gas mileage:
1. Keep the tires properly inflated.
2. Change the air filter regularly
3. Keep the windows up, they are like drag chutes.
4. Don’t follow too close.
5. Don’t speed.
6. Install dual exhausts and/or exhaust headers.
7. Idle less.

One trick to save on gas, which will not increase your gas mile, is simply to drive less. You can cut your gas bill by 20% by walking to close places. Gas milage will stay the same though.

By: Nate

Nate — Mon, 08 Jun 2009 18:49:15 +0000

Does any one know when I should change my oil on the switch over change? I started putting synthetic in at about 40,000 miles and used mobil 1 extended life it says it is good for 12,000 but My oil is starting to look dark?

By: Nate

Nate — Mon, 08 Jun 2009 18:45:34 +0000

I get about 35 more mpg with synthetic per tank in my 05 Wrangler.

By: Hong

Hong — Thu, 14 May 2009 03:03:28 +0000

There will only be a slight difference in increased mileage, although very unnoticeable. However, if you live in a colder climate you will notice increased fuel efficiency in the winter. Your car will require less idling time to warm up since synthetic lubricates your engine immediately and the oil will reach optimum operating temperatures.

By: Max

Max — Sun, 03 May 2009 20:31:16 +0000

Is it best to stay with a stock oil fiter with synthetic oil or is it better to change to a different style ? If so what brand

By: Wayne

Wayne — Thu, 30 Apr 2009 13:28:44 +0000

Using a synthetic oil in your engine is the best thing you can do for it. Most modern engines today operate at 200 degrees plus. In general, most non-synthetic engine oils are only good for around 180 degrees so what happens is the additive package burns off and the oil begins to break down quickly. (That,s why in general with non-synthetic oil it should be changed at 3000 miles or sooner depending on driving conditions.) As far as increasing fuel economy I would suggest using high quality synthetic engine oils with Friction Modifiers. One such oil I would recommend is Schaeffer Oil. Schaeffer Synthetic and Synthetic Blend Oil uses a high quality pure base stock with a suburb additive package with MicronMoly and Penetrol as the friction modifier. It is poss. to see up to a 5% increase in fuel economy using this oil.

By: jeff sheriff

jeff sheriff — Thu, 16 Apr 2009 18:31:47 +0000

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Engineered with the world’s finest synthetic base oils and high performance additives, the exclusive extended drain formulation delivers superior engine protection and maximum fuel economy. AMSOIL Signature Series 0W-30 is a premium grade synthetic motor oil that exceeds the requirements of modern, high-performance engines and older engines, replacing other 0W-30, 5W-30 and 10W-30 motor oil.