Mustang3GT07

Get it dyno tuned!

StriderTacticaL

I too seem to get pretty crappy MPG. Mods are in my sig, cars got 48,500k right now. I'm on top of all maintainance with everything except the spark plugs but I don't think they are quite due yet. I tried recording my MPG several times while driving calmly and I only get about 15.5mpg about 30-40% freeway in that.

boduke0220

I think its the car because thats the way the Yellow GT is in my Sig,all new filters and granny driving it still only gets like 220 to the tank MAX. and its just bolt ons

teej281

Need to get these things professionally tuned, or at least have a wideband to make adjustments to it via handheld tuner.

devongarver

Im going to politely disagree...

I think there are more advantages than just longevity in synthetic oil. Here are several examples listed in part of an article from the magazine Car Craft. Sorry OP don't mean to jack the thread...BTW I agree with SCT, Ive used em and hate them, they destroyed my PCM in my ranger lol. I use sniper now, easy as pie. Anyway, here is the blip from the article..



Because a synthetic oil's molecules are much more consistent in size and shape, they are better able to withstand extreme engine temperatures. By contrast, the unstable molecules in conventional oil can easily vaporize or oxidize in extreme heat. Mobil 1 synthetic is said to be capable of protecting engines "at well over 400 degrees F"; in the real world, most racers have no problem running synthetics up to 290 degrees F under prolonged use, but they get really jumpy when a conventional exceeds 270 degrees F.




Because a synthetic oil is chemically produced, there are no contaminants in the oil. By contrast, conventional oils contain small amounts of sulfur, wax, and asphaltic material that can promote detonation as well as varnish and sludge buildup. With no wax, synthetics will flow at much lower temperatures than conventional oils. In fact, synthetic oils are now available with viscosity ratings as low as 0W-30, as in Mobil 1's new Tri-Synthetic blend or Castrol Formula SLX. These oils flow more than seven times faster than a conventional 5W-30 motor oil during initial start-up, yet at normal operating temperatures act like a regular Grade 30 oil.
An 0W-30 synthetic oil is capable of pumping easily at -62 degrees F and flowing at even lower temperatures. Conventional oils are essentially frozen solid at that temperature, so there's simply no conventional equivalent to this new grade. There are 5W-30 conventional and synthetic oils, but even here, the synthetic has a real-world advantage: Mobil 1's 5W-30 will pump at -58-degrees F, compared to about -35-degrees F for a conventional oil.

But claims and talk are cheap, so Car Craft had Westech Performance run some of the new Mobil 1 0W-30 in Ford's prototype 392 small-block stroker crate engine. The Mobil 1 was compared to the generic (and recommended for this engine) 20W-50 factory-fill conventional oil, as well as 10W-30 conventional oil. All tests began with the oil temperature stabilized at 210 degrees F. The engine ran from 3,300-6,200 rpm, and several runs were made for each oil to ensure repeatability.
In terms of peak numbers, we found that the engine gained nearly 7 hp with the thinner conventional oil, and was up nearly 10 hp with the synthetic. No peak torque gains were observed by changing from 20W-50 to 10W-30 conventional; however, the synthetic was up 15 lb-ft of torque at the peak. Looking at average numbers helps explain where the gains occurred--both the thinner conventional and synthetic oils broadened the torque and power bands overall, but the thin Mobil 1 showed the greatest improvement under 4,700 rpm, indicating that the thinner oil provides less initial drag for the engine to overcome.
However, thinner oil also translates to lower oil pressure: The 0W-30 oil developed 10 psi less than the baseline 20W-50. Only 46 psi was on tap at 6,200 rpm--kind of shaky as most gearheads like to see at least 10 psi per 1,000 rpm. Still, the engine ran OK, and the bearings looked fine on teardown, seemingly verifying synthetic manufacturers' claims that their products' greater shear strength more than makes up for lower viscosity. Is 10 hp and 15 lb-ft worth paying two to four times more for a quart of oil? Or the potential for extended engine life? You be the judge.



I have always run synthetic as far back as i can remember, I just read an article a long time ago regarding this topic and never looked back. BTW I just put Some Mobil 1 0W-30 in my exploder...seems quieter on cold starts...maybe its all in my head lol.

teej281

5w-30 would be quieter than 0w-30. just saying.

devongarver

Now why would you say that?

teej281

Its a heavier weight and when i went from 0w-30 to 5w-30 i noticed a quieter motor on start up. A heavier oil is typically quieter from my experience. Speaking of oil, that needs changing. Thats gonna get done this weekend i think. lol

devongarver

Weird....completely opposite of what I have seen..Lighter weights coat more quickly and reduce the wear and noise on start up...

teej281

my thinking is that the thicker oil absorbs noise more than the thinner weights so there is less noise and probably absorbs more vibrations i'd think. now a lighter oil will give slight increases in power and better mpg, my car seems to run smoother with heavier weighted oil in it. Just my .02.