Brianss1

Anyone using this 5w40 synthetic Amsoil ? I have heard it is pretty good stuff. I can buy the Mobil 1 anywhere.This stuff I have to order. I have good size cam and head work in my 01 WS6 with a 4000 stall and 3:73.

Rokko

iTrader: (2)

I am using it. I switched from mobile1 0w40 to the amsoil. My pressure is a few ticks higher than it was with the M1. And it doesn't lose as much pressure when hot as the mobile 1 did. .

tirefryer

I am, and I really like it. It quieted the piston slap down significantly vs. GC 0W30. Also my oil pressure went up a bit. Give it a try you won't be disapointed.

mpe488

my dads running some type of amsoil in his new turbodiesel silverado, he loves it. oil changes are once a year no matter how many miles you drive, and the oil is excellent. They use the same stuff for semi's and never change the oil for over 400k miles.

Brianss1

So even though it says european its fine.I know thats probaly just a marketing scam.Ok I am going to use this,what about the filter > You using the amsoil filter also,or K&N.Also where is the best place to buy it.I think I am going to have to order it online.


01 ws6,silver,auto with yank 4000 stall,12 bolt ,3:73,TA rear end cover,,complete BMR chrome moly suspension bolts on's,k&n,slp lid,bg ram air mod,mac headers,off road y pipe,magnflow catback,MSD wires,NGK plugs,smooth bellows,slp mass air flow,throttle body coolant by pass,160 stat,
2.02 1.575 manly racemaster valves with fully polished and ported heads Trend Fully hardend pushrods, COMP TI retainers, Dual Valve spring's
custom comp 228 236 588 578 114 ,ARP hardware,New Z06 gaskets.Around 400 RWHP and 360 torque,more power to come after another tune.

Rokko

iTrader: (2)

I switched from the K&N to the long amsoil filter. It's length is perfect and just a tad lower than the bottom of the oil pan.

The "European" part of the name is in reference to the additive package I believe. Europe has more stringent guidelines for oil longevity and quality, or so I'm told. Take it with a grain of salt.

I get it from a local guy in our Northwest Regional section. He's a dealer. I can give you his name and you can PM him you'd like. It usually arrives at your door in 2-3 days after you order.

He'll be able to answer your questions better than I can.

Brianss1

Thanks I just contacted a forum member who is a dealer and he is going to send some 5w40 my way with there new synthetic fiber oil filter.

Patman

Also keep in mind those semis have gallons and gallons of oil in their system, plus they use a bypass filtration system to keep the oil cleaner. So you can't really compare the two.

Amsoil doesn't say you can go one year and unlimited mileage, for most of their oils they say one year or 25,000 miles, with the exception of their Series 3000 which is one year or 35k, and their XL line which is 7500 miles.

mr2guru

iTrader: (16)

I use the Amsoil 5w-40

dailydriver

But it is still one of the best oils available.

Camaro99SS

iTrader: (4)

The Amsoil is heavier then the GC. That's why you have more pressure then GC. It doesn't mean it's a better oil. If I put Valvoline 20W50 in my car, the same would happen as would quiet down some of the piston slap.

Jason

Patman

I agree.

tirefryer

I use the K&N HP2006 long filter with 6 quarts of the 5W40. K&N is one on the best flowing filters available. And the nut on the bottom is just a bonus. They are a little expensive but I only change my oil twice a year. So the price doesn't bother me.

tirefryer

It's not nearly as thick as a 20W50, but it is a little heavier than the GC, at a 14.2 vs. 12.2 for the GC. The HTHS is much better than the GC, which would lend me to believe it probally will show less wear, especially when you are beating on her. Even if it didn't protect as good as the GC I would use it just to quiet down the slap. 20W50 is way too thick for these motors, you would lose power and possible damge the engine.

SSCamaro99_3

iTrader: (1)

I am currently running it in my 1999 SS and my Dad's 2004 5.3 Sierra.

Camaro99SS

iTrader: (4)

I know and would never use it with stock bearing clearances. I was just making a point about viscosity and its effects. As long as I can find German Syntec or even Mobil 0W40, I will keep using those instead of paying more for Redline or Royal Purple and having to order it. The extra cost just isn't worth it to me on a street car if I already am running German Syntec.

Jason

dailydriver

Not to hijack the thread, but Patman (or anyone) how do you rate the current high quality/performance filters?? I know you once had a problem with the Mobil 1 filter at higher revs? How do the Amsoil SDFs stand up/compare?

rdeterman

iTrader: (2)

i talked to my rep today and hes gonna shoot me some prices early next week so ill let ya know.. sorry for the late reply

Patman

The Amsoil oil filter is very good, it flows well and is built very well too. I highly recommend it (although the K&N is still my number one choice)

bad6as

iTrader: (17)

mobil 1 has 5W40 out now too