VVT and 5w20

[JCM35]

I have a 2010 fusion 3.0v6 and a 2013 mustang v6 both have variable valve timing. I have no problem using 5w20 have used it in many vehicles specced for it without issue. My fusion seems to burn a bit of edge FST in 5w20 around the 5grand mark. wondering if i can step up a weight to 5w30 and will it affect my vvt in either vehicles? I understand warranty issues with using 5w20.

 

[LeakySeals]

Nope, your fine to step up. VVT's tend to like thin oil at startup to gain hydraulic oil pressure in the controller/actuator gear fast as possible. The system is comprised of very small galleys and passages so it takes a second or 2 to flow. Because your substituting warm viscosity, its a non issue.

 

[mechtech2]

Maybe there will be a problem in cold winter warm up. Maybe.

Like Leaky says, when warm, no harm- no foul.

 

[oggb]

No problem. Ford specs 5w-50 in some of the higher performance Mustangs and those have almost identical VVT systems and most will never see a track or experience VVT failures.

 

[Trav]

No problem at all. Millions of engines with VVT are running heavier oils every day in every kind of climate with no problems whatsoever and have never seen 20w.