androdz

I was told by my motul dealer that the reason why most automanufacturers use 5w-20 is because it is less viscousity and gives higher mpg but at the cost of long term protection. I was recommended to switch to 5w-30. Anyone else has any imput on this?

Att. Andrew

mustangman02232

whatever ford recomends, but run royal purple

__________________
91 f350 7.3 IDI E4OD - DD/work truck
K&N, banks trans cammand, flat bed w/tool boxes + headache rack, custom 3/8" thick dimond plate bumper
8' fisher, 2 yrd dimond sander

02 mustang v6/auto - intake and exhaust- SOLD
-15.7 @ 89 mph 2.4 60

92 camaro 305 TBI/auto-3.73/exhaust-SOLD
-16.1 @ 85 mph 2.2 60'

88 toyota pickup-SOLD
built 22RE 5 speed lifted on 33s w/ 4.88s


RIP tripsevn7
4/1/77 - 7/27/08

androdz

I was specifically told by the distributor the only reason they do it is because of incentives for better mpg. Thinner oil means less resistance between moving parts = higher efficiency which then transforms into higher mpg. He said that 5w-20 is good for fuel efficiency but it does not protect the motor adequately and if I was planning on having the motor for the long run I should switch to 5w-30. Any other opinions?

Att. Andrew

freefallpat

I'm using 5-30. I was also told by my tuner and my FORD DEALER to stay clear from that 5-20 crap. I'm glad I am not the only one that was told this.



Patrick



- Painted stripes with painted mirrors and louvers
- Painted Gauge pod/ Boost Gauge/Air fuel/Oil pressure
- Torque H/P Conv.
- M-4209 Gear 4.30- Hood Pins
- Magnapack Exhaust
- Steeda Springs
- Carbon Fiber Dash kit
- 4FU218-020SQ Vortech 08 PSI
-Predator-Final lap tune







[IMG]local://upfiles/24844/A8079038E9D94206B77E4B1C2483AFEE.jpg[/IMG]

[IMG]local://upfiles/24844/66AFDC53DB544519B77A7961F38C0E8C.jpg[/IMG]

[IMG]local://upfiles/24844/00F24580A6204F1A833FE9FCF9EDA380.jpg[/IMG]

__________________

MikeVistaBlue06

They have a lot of 5W-20.

Rt1Rebel

I'm sticking with 5-20 in the Mustang. If you use synthetic and change regularly, the oil will hold up, so shooting for a wear range for the oil isn't something you have to worry about. I use 10-30 synthetic in all my other cars even though it's not recommended for them, but none of them are nearly as sophisticated as my 4.6 3V.

__________________
THIS ACCOUNT HAS BEEN DEACTIVATED.

androdz

I understand but It is also a fact that ford selected the 5w-20 to get into the incentives the goverment gives for higher mpg cars.

ATt. Andrew

Rt1Rebel

I seriously doubt Ford would recommend an oil weight that was going to cause problems with their flagship auto just to meet a number. What are we talking? 0.05 MPG? If it were that easy, everyone would be making engines to run on helium weight oil. Anyway, I doubt 5-30 would cause a problem either, so go with it.

__________________
THIS ACCOUNT HAS BEEN DEACTIVATED.

MikeVistaBlue06

5W-30 oils

androdz

Well the dealer told me it was to get some incentives the goverment was offering for higher mpg engines. Dont know like 3-4 oil dealers have told me that already. What do you all run on your mustangs?

Att. Andrew