anyone use mobil1 15w50 synthetic?

Bundmar · Oct 17, 2004

anyone try this oil, I was told its for performance driving let me know

bdcardinal · Oct 17, 2004

a friend of mine uses it in his 04 kenne bell cobra, well not inthe motor, in the blower. its too thick for the 4.6 IMHO. stick to 5w30.

CanadaStang · Oct 17, 2004

Kinda heavy. Heavy oil robs power. If you are driving your car in very hot weather it would be OK., but this time of year I wouldn't use it.On cold mornings, with 15-50w oil it will take a few moments for it to get up into your motor and causing premature wear to cylinder walls, rings, bearings.

AdRock · Oct 18, 2004

Bundmar said:
anyone try this oil, I was told its for performance driving let me know

It never gets hot enough in Canada to need an oil that thick. Stick with 5w-30

CanadaStang · Oct 18, 2004

AdRock said:
It never gets hot enough in Canada to need an oil that thick. Stick with 5w-30

Ah, didn't notice he was from Canada. Right you are!! Don't use it.

Turbo92PGT · Oct 18, 2004

Diesel oil is normally 15-40. That 15-50 is too thick if you ask me. I run 5-30 mobil 1 with no problems. Seems to work good. Still burns it though

jbrown · Oct 18, 2004

5w-30 is what ford calls for, I use the mobil 1 too.

Rocketman · Oct 18, 2004

Overhead cam motors need a thinner oil. The 4.6 Modmotors are designed to use 5W-20 oil. The lash adjusters and timing chain tensioners are all hydraulic and work off of a specific oil weight and that is 5W-20 or equivalent Mobile 1 0w-20 fully synthetic.

COBRA90GT · Oct 18, 2004

CanadaStang said:
Kinda heavy. Heavy oil robs power. If you are driving your car in very hot weather it would be OK., but this time of year I wouldn't use it.On cold mornings, with 15-50w oil it will take a few moments for it to get up into your motor and causing premature wear to cylinder walls, rings, bearings.

The new 20 weight designation from FoMoCo stems directly from their CAFE numbers (saves Ford more money when they improve fuel economy, bleh).

bdcardinal · Oct 18, 2004

word, when the mod motors first came out they called for 5w30 and had no problems. the 5w20 is just to raise the CAFE, believe me you can use 5w30 and everything will be fine. o and no matter what they try to tell you, your warrenty wont be voided for using 5w30 instead of 5w20.

tangerine · Oct 18, 2004

for the lifters to pump up properly use either 5w-20 5w-30 or 10w-30. if you use to thick of a oil then the top end will not recieve the proper amount of oil.

maddogg545 · Oct 19, 2004

I use 5w-20. What is the difference between that and 5w-30? Is 5w-30 better for the engine?

bdcardinal · Oct 19, 2004

generally it is argues that 5w30 is better for the engine because it is thicker at operationg temperature 20 vs 30 and therefore provides more protection. the only reason ford switched to 5w20 is because it increased their corporate average fuel economy by a small amount. it is not because of any internal engine tolerance differences whatsoever.

Silvr04GT · Oct 20, 2004

What about between 0w30 and 5w30 which one of those would be better?

COBRA90GT · Oct 20, 2004

Silvr04GT said:
What about between 0w30 and 5w30 which one of those would be better?

After looking at your location, I would use the 0w (because it would have better "flow characteristics" at near freezing temperatures compared to the 5w, and flow even better than the 10w). All three types of oil (0w, 5w, 10w) will, however, flow the same once the oil/engine reaches operating temperature.

The first designator number simply tells you whether or not the oil will flow well when it is cold outside (you want the oil to pump up freely through the engine ASAP, to avoid engine start-up wear). Having an oil like a 0w-xx or 5w-xx oil will get through the engine quicker than one that is 10w-xx.

Silvr04GT · Oct 20, 2004

COBRA90GT said:
After looking at your location, I would use the 0w (because it would have better "flow characteristics" at near freezing temperatures compared to the 5w, and flow even better than the 10w). All three types of oil (0w, 5w, 10w) will, however, flow the same once the oil/engine reaches operating temperature.

The first designator number simply tells you whether or not the oil will flow well when it is cold outside (you want the oil to pump up freely through the engine ASAP, to avoid engine start-up wear). Having an oil like a 0w-xx or 5w-xx oil will get through the engine quicker than one that is 10w-xx.

I only drive my car in the summer though. So basically using 5 or 0 won't make much of a difference?

UVBNHAD · Oct 20, 2004

jbrown said:
5w-30 is what ford calls for, I use the mobil 1 too.

That's not completely accurate. They did use that for the first few years of the 4.6 but for the last two-three years 5w-20 is what is recommended.

Personally I use 5w-20 Amsoil. Yes I spend a little extra money on the oil but how often do you actually change it? Once every six-to eight months depending on how much you drive. Plus the Amsoil is a 7500 mile cycle so you get a little extra time before you need to change it.

03-s281 · Oct 20, 2004

Bundmar said:
anyone try this oil, I was told its for performance driving let me know

If your driving a dump truck
Stick to 5-30 or 5-20

svo978 · Oct 20, 2004

I heard about an article where someone replaced all the oil in a Caprice to Royal Purple, and gained 15rwhp (trans. oil, engine oil, and gear oil) So now I pay the extra for R.P. 5w-30. It makes me feel better anyway!

bdcardinal · Oct 20, 2004

im sure you would get that with any synthetic. im also sure that the oil in that caprice was pretty sludgy and putting in any sort of new oil, trans, and gear oil would give horsepower gains.

anyone use mobil1 15w50 synthetic?

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