the engine code P0014 my exhaust camshaft was overadvanced and I could tell by ear because it was dieseling..I looked online and found the GM 2.4L had this issue as did some Saturns and I found Aveo and most of them had the same actuator....so I took it out and removed the screens as i read online to do, put it back in and it ran great (engine light went out)....one tank of fuel to confirm there was a substantial increase in MPG it was so dramatic I didn't even have to pencil it out I reset the trip each time I fuel. I could tell just by driving it huge change, it actually had some pep which it has never ever had.
It has to be somehow in part at least connected to Amsoil because the screens are clear why will it not run right with them on. Dexros1 states good for VVT, Amosil not Dexos1 approved but they say they meet the specs...IDK what I can tell you for sure is oil and oil changes can and very likely will change how the engine runs and mpg.
My wife took the Aveo on a distance trip (and shes still gone hurray), with both new actuators installed shes getting 33 MPG 90% HWY and 10%City and she is doing 110-120 KM/HR on the HWY and she has both kids and car packed full....we couldn't get 27 MPG out of it before with one passenger at 90 KM/HR all HWY cruise set, in the winter it was 20-21 MPG and it's been that way since the day we brought it home....I called our dealer after we had it for 2 months and said I would have bought a dodge 4x4 if I had of known I was going to get this kind of milage....
The other actuator is same position on the head towards the firewall...they come in and out in under 30 seconds.
I do not know what will happen if you run without the screens, what I do know is it runs way better without them. I would need to remove valve cover and run engine to see whats going on in there with and without the screens....what I can also tell you is mine diesels with the screens in and doesn't when they are out. I am going to change the oil again when she gets back see if that makes a diff....this Amsoil is not cheap be the third oil change in 4 months man oh man. If it doesn't smarten up with new oil I will try Mobile 1 again...I will keep ya posted not to worry.
This forum is great way for "people power" to effect change...I just want a car that works which is what I paid for and I didn't get it. I am just posting what I am doing/trying and the end results.......I am making a front control arm brace here will post all that when it's done.
And I have ran Mobile 1 synthetic in this car since it 5000 KM on it, and when I switched from the factory fill at 5000 KM to Mobile 1 synthetic, I did a back to back oil change just like I did with the Amsoil ...and it's been changed ever 5000KM since which is about twice as often as is required...so Amsoil not going to tell me it's from lack of previous maintenance...and I have a magnetic drain plug in it also..which catches alot of stuff, has had 4 aircleaner changes and they all looked like new and I think 3 sets of plugs 4th set in there now. Two brake system flushes, three power steering system flushes, three transmission flushes...lack of maintenance..no.no.no. I did all those myself so I know they actually did get done..trans and ps switched to Amsoil at very low KM's and been in there ever since.