Originally Posted By: dogememe
Originally Posted By: oldoak2000
Originally Posted By: dogememe
My just acquired Ford escape has about 211k miles on the 3.0L V6. It's been serviced for years at the local Castrol quick-lube and according to the sticker they put in 10w-30 high mileage. If I go to 5w-20 (which the car calls for) non-high-mileage, is it going to start leaking out everywhere, or will it be OK? I intend to use Royal Purple because I can get it for the same price or cheaper as Castrol and Mobil1.
try it with just the RP (and no additives); IT will let you know...
i've got an '05 chevy with 280K miles and it STILL doesn't burn or leak a drop of oil using only ST FULL SYN 5w30 @7K intervals for last 180k miles . . .
no additives
no hm
Oh yeah, I would NEVER put in any oil additives. Alright, I'll give it a shot and see what happens. Worst case I switch to Valvoline Maxlife Synblend or O'Reilly brand Full Syn HM. Thanks
Originally Posted By: oil_film_movies
That HM oil has seal
conditioners, but seal
swelling should be engineered to be the same as non-HM oils according to seal swell test requirements in SM/SN oils these days. It should be fine, but I'd still want to use an HM (pick 5w30 HM) oil in that 10 year old vehicle.
Thank you! I was under the impression high mileage oil actually swelled seals, not just conditioning... good information! Makes me a little less worried. Any particular benefit to 5w-30 in an engine that calls for 5w-20. I mean, when I had my Crown Vic I ran 5w-30 instead of 5w-20 because I know thesame engine originally called for 5w-30 and were back-specced to 5w-20 for fuel economy reasons and I beat the snot out of that car... but I'm pretty sure the 3.0L V6 is a newer design with thinner oil in mind. Maybe I'm wrong? Wouldn't be the first time
And btw this is my "gas saver" car so I need best MPG possible
I have the 3.0L v6 in my fusion and you can run anything from 5w20 to 20w50. I'm currently running M1 HM 10w-30 and its doing quite well with about 5k miles on the oil.
If you haven't replaced the PCV valve with a new OEM valve I recommend you do so. Mine started allowing a lot of oil to pass around 150k. Changed the valve and now I'm back to a quart in 6k.
Monitor the level closely when you switch to 5w20 in case it does develop a leak or consumption increases.
Spend $8 at Walmart for the dual pack of throttle body cleaner and MAF sensor cleaner. Clean out the MAF and allow to dry. Take the throttle body loose from the manifold and clean it. Put it all back together and enjoy the smooth running. I just did the cleaning on mine and it cleaned up a slight miss I was seeing on cold idle. Now it runs smooth as silk.
It's a great motor. Will serve you well. Wind it out occasionally and consider a drain/fill in he transmission of you haven't done one recently