Synthetic Oil save more gas?

[cRiPpLe_rOoStEr]

Viscosity is what matters for mileage increasements.

[nackerton]

Originally Posted by cRiPpLe_rOoStEr

Viscosity is what matters for mileage increasements.

Unfortunately lower viscosity increases engine wear, at least in an engine which isn't designed for low viscosities.

http://ecomodder.com/forum/showthrea...els-25942.html

[mikeyjd]

Originally Posted by nackerton

Unfortunately lower viscosity increases engine wear, at least in an engine which isn't designed for low viscosities.

http://ecomodder.com/forum/showthrea...els-25942.html

I didn't put 0w20 oil in my diesel I was referring to my festiva in the previous post. my diesel has 10w30 mobile1 full synthetic.

[cRiPpLe_rOoStEr]

Originally Posted by nackerton

Unfortunately lower viscosity increases engine wear, at least in an engine which isn't designed for low viscosities.

Sure. It's not for everyone.

[Jakins]

i always put a little heavier oil in because in texas it so freaking hot and i have some leaks and i think i burn a little oil. like 10-30. should i just be using super light oil anyways? also i put some marvelous mystery oil in with oil change too. i think that makes it alot lighter.

[Jakins]

speaking of which. i put like 2/3 of a quart of marvelous mystery oil in on my last oil change. for the past 150K miles the oil has been black. now after this oil change it is crystal clear.

[redpoint5]

Originally Posted by Jakins

speaking of which. i put like 2/3 of a quart of marvelous mystery oil in on my last oil change. for the past 150K miles the oil has been black. now after this oil change it is crystal clear.

How much oil is your car using? It's normal for cars to use some oil over time.

My old Subaru used a quart every 2000 miles from the day I got her at 119,000 miles. Oil use increased significantly when I used 10W 30, and decreased when I used 10W 40.

The higher viscosity will usually leak more slowly and protect the engine better, at the cost of a marginal amount of fuel economy.

[Jakins]

Originally Posted by redpoint5

How much oil is your car using? It's normal for cars to use some oil over time.

My old Subaru used a quart every 2000 miles from the day I got her at 119,000 miles. Oil use increased significantly when I used 10W 30, and decreased when I used 10W 40.

The higher viscosity will usually leak more slowly and protect the engine better, at the cost of a marginal amount of fuel economy.

well at one point it seemed like it was going through a quart like every 500 miles. maybe im exaggerating. it was on a 2000 mile trip. but i fixed the distributor seal and cam seal and it helped alot! i see a bunch of oil at the bottom of the timing cover and im afraid it might be my front mail but i dont know. could just be all the oil that leaked down from the cam seal. also my vtec solenoid is leaking. but currently the oil leakage has slowed down alot! running 10/30 i think with the MMO which thins it out quite a bit.

[LeanBurn]

Unless you are seeing below zero temps on a regular basis (like in the winter) you will not benefit in seeing higher fuel economy. I have run synthetic for most of my Corolla's life up until recently and experienced no change in fuel economy, in fact in the Corolla (switched 8000kms ago) I am seeing some of my best tanks yet and its no spring chicken.

If you had a turbo car or in the winter, I would run synthetic.