Was talking to a friend at work who just did a bunch of top end work on his 00 legacy. He said it runs great now but has some significant valve noise. Anyone have a certain oil that helps quiet this down? Just run a 40 weight like T6?
Yeah, if it makes a lot of noise it doesn't sound like he did it right. You shouldn't chase oil viscosity to try to quiet down something that needs to be fixed.
That said, EJs are typically OK to run 50 wt in warmer weather.
You will have to try a few, see how your engine feels and sounds on each and reach a determination as to which one quiets it down the most.
Hopefully nothing happened to the engine that makes it clack and clatter like it should not, that said, I would first try some kind of 30 or 40-weight Pennzoil. Whichever one ends up working best for you is for you to find.
just did a bunch of top end work on his 00 legacy
If the timing or valve adjustment is off, and if that is why it sounds not right (does the car stall? Accelerate well? Accelerate bad? How bad is it?) is off then and it's not the oil fault.
I'd go with the 15W-40 HDEO of your choice (these days I prefer Super Tech).
As SubieRubyRoo indicated, something like a 20W-50 would be fine in the summer too, and happens to be what I'm using in mine at the moment.
Redline 5w30 is built to quiet engines, stacked with ep/aw additives and polar base oil. But, first I would try ucl, maybe it will quiet the upper end. You could always use a much thicker checper oil as well and even first, keep in back of mind of it isn't satisfactory there isn't a group 3 in 30 weight oil that will quiet more then redline 5w30. I would generally start using redline before 75k miles, if not I'd try everything else first.
I kindly suggest to do an motor oil Flush, using a detergent additive in the old oil, few minutes prior to an old oil change.~â–ºHere are some examples.The reason is that these Subaru engines runs on hydraulic lifters, whose tiny oil passages tend to get clogged with gum and varnish buildup from the old oils being hot during all this time, miles and usage; so a motor flush will remove the Clog and using a Good motor oil, such like this one below:
Originally Posted by Charlie2015
Will quiet the engine and also elongate its lifespan.