lucky644

Was going to put in 5w20 as the winters here are quite harsh, but since there is the issue with fuel dilution with the Ecoboost is this a bad idea? Will it become too thin? It can get as low as -40c here and I do keep my truck plugged in but I just wanted to reduce the wear on cold startup as much as possible.

NASSTY

Probably be better off with 0w30.

fordguy91

The W in 5W30 represents winter, you'd want a 0W oil like 0W30 and not 5W20 for better cold flow properties.

lucky644

My truck from years prior was 10w30, forgot fords was lower.

Question still remains, should I drop it further or will the fuel dilution be bad, I noticed my oil level rises and smells like gas.

vozaday

5W30, I live north of you and never had a problem with the truck not starting. Just plug in you vehicle when you can.

itguy08

I wouldn't. Ford says 5w30 for all climates. Use that and be done with it.

However if you are "making oil", I'd get it in and at least have them do the TSB for it. And possibly check for a leaky HPFP - there have been reports of those on the 13's.

vozaday

^ and the TSB allows for an actual block heater.

Ron AKA

Based on what I have seen, you would be very foolish to put in a 5W20 or 0W20. The fuel dilution with the EcoBoost is the real thing. 90% of the over two dozen used oil analysis samples I found showed the 30 weight oil had thinned down to 20 weight, and one sample was getting close to 10 weight. If you start with 20 weight for sure you should expect to go down to 10 weight. In Edmonton I would run one of the two following oils if you want to stay within warranty obligations (API SN and a 5W30 viscosity):

Chevron Delo 400 LE 5W30
Mobil Delvac 1 LE Synthetic 5W30

If you want better starting and are not worried about compromising warranty then consider some 0W30 viscosity oils. One good one would be:

Mobil Delvac Elite 222 0W30 (Formerly ESSO XD-3 0W-30)

Not sure how available the Chevron product would be in Edmonton, but suspect you can get the Mobil products at McEwens.

To help to avoid gasoline dilution it would be really helpful to plug in when temperature drops to freezing or lower. It also takes the heat off using a OW oil.

itguy08

Ignore Ron's "advice" as neither of those oils he mentions meets the Ford WSS specification for a gas engine.

Ron also doesn't own an Ecoboost and has 0 experience with an Ecoboost other than "what he reads on the Internet to boost his flawed thinking".

For the sake of your warranty, use an oil that at least says it meets the Ford WSS spec as printed in your manual.

vozaday

+1, other than the plugging in part