Is Amsoil drain interval alright with 1MZ-FE?

[fj40supraman]

I run Amsoil 5w-30 in my 1MZ-FE. and I'm just kinda concerned as to the drain interval. Amsoil is the finest oil I can find, and I would like to do the 6 months filter change and use the oil for a year, but I've done some research and from what I've read with the sludging problems, I'm wondering if I'm pushing my luck? I can get Amsoil for about $6 a quart, so price isn't too bad, do you think I should just change oil when I change filter? So what actually causes sludging of oil? I'm not sure I totally understand sludging oil, is it just getting real thick? Thanks for insight.

[Eye8Pussies]

well, just a question tho- why are you trying to skimp on the oil changes?

[88 LE]

Originally posted by fj40supraman
Do you think I should just change oil when I change filter?

Definitely.

So what actually causes sludging of oil?

Oil breaks down after time. When it breaks down it turns into sludge (thick gooey brown shit).

[Ken4]

Used Oil Analysis (UOA) is the best way to determine oil change intervals. If you are not going to do a UOA, stick to 6000miles / 6months max. for any good quality synthetic.

[amerikim]

6 months? Hmmm..Just hurts to think about it.

[fj40supraman]

You guys must not be familar with Amsoil. This isn't a interval set up by me, rather what Amsoil recommends. The more I think about it, Amsoil (or rather any synthetic) would be better suited to the 1MZ-FE as synethic oil is much more durable and shouldn't breakdown half as fast as conventional oil. Amsoil even warrants their oil to the extent that if your engine internals fail due to their oil, they will pay for the repairs. Good luck getting them to pay for a seized up engine though. They would find something else to blame it on. If the engine does seize up, I have to believe it would give tell tale signs. I guess I'm just gonna go with the 6 month change intervals.

[Eye8Pussies]

still....I don't know.....its 5w30 synthetic, so read the fine print about how you drive the car tho....

if you drive your car hard, there's no way that it'll hold out for 6months....but it's really your call....but is it worth it to put your car at risk just to save a bit of $$$?

[Ken4]

Here is an example of an Amsoil ASL 5w30 user on a LS1 with 9000miles and 6months. Notice the TBN has dropped to 1.9, this oil is just about had it. No way it will last 1 year.

http://neptune.spacebears.com/cars/s.../oil-life.html

[amerikim]

No way I'll play. When I check my dipstick and it looks whack, it's time for an oilchange. Milage is always monitered.

I do not buy off on any oil because taking into account all the contaminants and garbage coming from piston blowby and sludge forming. Nope. Acids eating my precious ancient Cam's insides..I won't have it I tells ya.

Makes me want to run out and change my oil right now..

[warlock]

i use synthetic and change it every 4/5000 but i do that in 3 to 4 mounths never go a year oil breaks down on it own( it seperates)
if you whount your motor to last dont be cheap. you pay for the filter change the oil