Engine Oil

[311evo]

For the oils without detergents, how often are you supposed to change them?

[Febo]

I always wondered how long everyone here goes on their oil changes.

Now I know, and I must say, my car is babied by comparison to some of your guys' cars.

I change my IS300 every 4-5k with Valvoline SynPower and a Mobil 1 filter.

and my old GSX was changed every.... I dunno, 2 months of so since I was always tearing it back apart. The lowest that would get changed with was Valvoline Durablend. Eventually changed it to Mobil 1 5-40/0-40. Totally got rid of my lifter tick. Best thing I ever did to that engine.

I stopped using any form of conventional back in my GSX days. I don't believe in conventional anymore. The science is there. Synthetics for life. But I don't believe in running synthetics past 5k. Mostly due to my mistrust for filters. I've seen too many of the new internal filters come through my shop that have failed and were letting dirty oil flow through without filtration.

Also, I seen something around here about color. Black... like pure black... is not good. Your filter should keep it from being pure black. Dark yes, Black, no. If your oil is pure freaking black change it or change your filter.

I know, I know. Modern detergent oils turn dark because they are carrying the sludge and debris from operation.... But it still shouldn't be BLACK black. Chances are your filter failed awhile back at that point.

[Febo]

For the oils without detergents, how often are you supposed to change them?

3k miles. Thats were the old wives tale came from was those oils.

[311evo]

3k miles. Thats were the old wives tale came from was those oils.

Ahh okay Thanks. Is there really any advantage to using non-detergent oil? it seems like the stuff with it is healthier for the engine, and lasts longer. :rock2:

[A//// Guy]

Castrol syntec, and audi recommends 10k oil change intervals. I got usually about 6 since the cars modified.

Non Synthetic oil, id go 4k easy.

[awd-drifter]

Hmm..read this whole thread and it seems people are using Amsoil and M1 either the 10w30 or the 10w40. Good read by the way. I have a few questions though;

(1) Does it matter which oil (amsoil, m1, pennzoil, valvoline...all synthetic of coarse) I use for the mods I have and will it effect performance?
(2) I was told not to really change from (x brand) to (x brand) because of the different "ingrediants" they use for each oil...is this true? Is that why when a few of us change to different oils, there's suddenly an issue?

In my personal experience, I've been using M1 10w30 since I got the car. I've literally changed the oil RIGHT under the 3000 mile mark every time with the NAPA gold oil filters. My head currently has a leaky valve, so I'm guessing that is why the car loves to eat 1-1.5 quarts every 1500 miles. Haven't had any issues with the engine though. Head still looks pretty spotless. I will post pictures of the head soon once I get to work.

[Halon]

(1) Does it matter which oil (amsoil, m1, pennzoil, valvoline...all synthetic of coarse) I use for the mods I have and will it effect performance?
No idea what your mods are so can't answer that.




(2) I was told not to really change from (x brand) to (x brand) because of the different "ingrediants" they use for each oil...is this true? Is that why when a few of us change to different oils, there's suddenly an issue?
No idea what sudden issues you are referring to as I've never experienced these sudden issues you speak of, and i use different oil brands regularly (I buy what ever is on sale). So again can't answer that.

[awd-drifter]

No idea what your mods are so can't answer that.




No idea what sudden issues you are referring to as I've never experienced these sudden issues you speak of, and i use different oil brands regularly (I buy what ever is on sale). So again can't answer that.

lol..early morning ftl.

as for my mods; e316g, 550s, 190 pump, 2g mani, fmic, 3" exhaust system, ported o2/2g mani, dsmlink v2(untuned still! :( ). The car has been doing fine for the past 3 years so I'm pretty satisfied with m1 10w30. Haven't driven the car since winter came though.

As for the issues for your main car and not a DD, I was reading other posts on here saying that when they switched oils, one of the members here got a spun bearing, Goodhart mentioned one of the Supra guys (mk3) getting the same thing. I haven't gotten any issues because I haven't switched brands of oil just because of the different "ingrediants" x-brand has compared to the other x-brand. As for the DD, I too buy what ever is on sale :D

[Kracka]

1. No. In the real world any major brand synthetic (or conventional) oil is going to perform perfectly fine within reasonable oil change intervals. I use Mobil 1 because it's factory-fill on Evos and cheap at Walmart.
2. Personal preference; I believe in picking something and sticking with it, but Brandon is the exact opposite.

[Halon]

2. Personal preference; I believe in picking something and sticking with it, but Brandon is a cheap ass.

Fixed that for ya :)