Hey guys whats going on, so I am about to change my oil and need some input. Typically on any car I have driven i put in the fully synthetic extended life oil. What oil would you recommend and for what reasons? Any advantages of some other oils over the fully synthetic like the eneos for example.

Thanx Guys

Manual says synthetic only in Evo X. Other than that there are several threads on this topic discussed in length. Do a quick search will turn up alot.

Manual says synthetic only in Evo X. Other than that there are several threads on this topic discussed in length. Do a quick search will turn up alot.

Thank Youuu

Amsoil
Modded 20w-50
Un-modded 5w-30

I was looking at the routine mantinence section in my owners manual the other day and I could swear that I saw that it had you changing the oil filter every 10k and the oil at the regular 5k. I change the filter and oil together everytime...

10w-30 Mobil 1? I am using 15w-50, my engine is not modded much, just a tune and exhaust.

Mobil 1 makes a 5W-30 extended life which they say is good for 15k miles. There were wear tests done and it supposedly had a tiny bit better wear protection (than standard Mobil 1 5W-30) so that it could withstand a longer change interval.

You could run that oil. I would still recommend following the regular change intervals so you can keep your warranty intact.

EDIT: link to product http://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_Extended_Performance.aspx

20/50 in the summer modded or not ! Some of these cars really need that extra help .

the car takes 5w-30 from the factory. when you say modded should i stay with 5w-30 or go up more?

the car takes 5w-30 from the factory. when you say modded should i stay with 5w-30 or go up more?

What does your tuner suggest for your mods, your tune, your power level, your driving style, how many times you race, what type of racing, just daily driving? Follow your tuner's recommendation.

20/50 in the summer modded or not ! Some of these cars really need that extra help .

You still using the 5w-30 in the winter?

If you don't change (increase) the bearing clearances, why would you think a thicker oil is indicated?

if i want more protection for my engine. do i just go higher with the gasoline rating

http://www.yardbarker.com/media/8/c/8c19fed5c1c5386cf30aec67740a6b759a2c1d48/xl/Beating_a_dead_horse.jpg

You still using the 5w-30 in the winter?


I ran 10/30 in the winter down here in FL if you're higher up north a 5w30 will do just fine . All our customers run 20/50 !

Moved to Evo X Engine.

if i want more protection for my engine. do i just go higher with the gasoline rating

Octane protects against knock but you also need protection against bearing damage and that's where using a heavier oil comes in . Oil has the function of lubrication but it also has to cushion the bearings . As you go higher in boost the pressure pushing down on the piston top increases and thus you would want that extra layer of protection . We melted all 4 of our X pistons and had ZERO damage to our bearings , we've been running 20/50 since about 750 miles :freak:

Octane protects against knock but you also need protection against bearing damage and that's where using a heavier oil comes in . Oil has the function of lubrication but it also has to cushion the bearings . As you go higher in boost the pressure pushing down on the piston top increases and thus you would want that extra layer of protection . We melted all 4 of our X pistons and had ZERO damage to our bearings , we've been running 20/50 since about 750 miles :freak:

:+1: :yeahthat: :iagree:

The oil in these cars is made for what they can do stock, and even then they run so rich you stand the chance of getting gas seeping down into your oil and thinning it out a bit while driving hard. For myself adding the protection of a higher viscosity is just a inexpensive safety mod.

Octane protects against knock but you also need protection against bearing damage and that's where using a heavier oil comes in . Oil has the function of lubrication but it also has to cushion the bearings . As you go higher in boost the pressure pushing down on the piston top increases and thus you would want that extra layer of protection . We melted all 4 of our X pistons and had ZERO damage to our bearings , we've been running 20/50 since about 750 miles :freak:

How much power do you think we need to make in order to use a thicker oil?

:+1: :yeahthat: :iagree:

The oil in these cars is made for what they can do stock, and even then they run so rich you stand the chance of getting gas seeping down into your oil and thinning it out a bit while driving hard. For myself adding the protection of a higher viscosity is just a inexpensive safety mod.

Fuel dilution in the oil is a problem with these cars on the stock tune. I just changed my oil this weekend (1,777 miles on the odo) and it stunk like fuel (car is still 100% stock0. The stock tune is so rich that it can't burn off all the fuel and it gets in the oil. There's a thread on the "other" Evo forum all about it. Not much you can do other than get a tune to lean things out.

I tried finding what oil is being factory loaded in the FQ400, but had no luck. Anyone know? I am curious if Mitsu changed to anything other than 5w30 for the tuned version.

How much power do you think we need to make in order to use a thicker oil?


Its not only a question about how much power but also how much stress . Stress is the amount of work you are getting out the motor within x-amount of time . So if you're beating on your car during an autoX event or like event then you will be placing x-amount of added stress on the motor which is out of the norm for that oil .

explain this to me if someone would. With say a 20/50 as opposed to a 5/30 since the oil is thicker is there any type of loss in power between the two? I understand how its protects and all that jazz just not sure if theres a noticeable performance difference?

Opinions on oil are just too many, you should do your own research and figure out what you want. Unless you are making SERIOUS HP with a modified turbo and higher RPM's you wont need thicker oil than 5w-30. Thicker oil works better for high rpm, and does not improve low RPM protection. I actually went from 5w-30 to 0w-30, I like it much better better because of quicker warm up and quicker revving. I recommend amsoil 0w-30 signature series or Mobil 0w-30 advanced fuel mileage. Using a 0w-30 has many more advantages BESIDES winter starts. I wouldn't go up to 40 or 50 unless you have a high mileage(looser tolerance) car or you are at much higher RPM.

explain this to me if someone would. With say a 20/50 as opposed to a 5/30 since the oil is thicker is there any type of loss in power between the two? I understand how its protects and all that jazz just not sure if theres a noticeable performance difference?

Using thicker oil without changing anything else will result in slower spool and usually slight loss of peak HP.

Another thing is, oil weights can be decieving. Look at the product data sheet of the oils you're considering and you will see the kinematic viscosity(expressed in cst) at 40 degrees C and 100 degrees C. A lower number means less resistance. Amsoil 0w-30 has one of the lowest kinematic viscosities that I have seen and it has more than enough protection for a low mileage car with stock or near stock redline. Unless you're running ridiculously high RPM's or 600WHP I don't see any benefit of going to thicker oils and higher kinematic viscosity numbers.

currently I have hks drop in, buschur exhaust, ams test pipe, ETS upic, xtreme boost down pipe and a tune. made 333 wheel 320 tq thats before the downpipe and exhaust. I will be getting re tuned very soon and plan on running 5 w 30 probably making around 350-360 wheel and tq. any thoughts?

Using thicker oil without changing anything else will result in slower spool and usually slight loss of peak HP.


humm , no ! This is something that EVERYONE does and no I've never seen any sort of power lost of any sort in any of the many cars we've worked on and the many cars I've owned myself . Also , no lose of spool , thats the first time I hear of that .

humm , no ! This is something that EVERYONE does and no I've never seen any sort of power lost of any sort in any of the many cars we've worked on and the many cars I've owned myself . Also , no lose of spool , thats the first time I hear of that .


Everyone does what? Goes to a thicker oil without changing anything else? NO ONE does that. Physically speaking, since you dont have any dyno results showing me two different oils, a thicker oil with higher kinematic viscosity ALWAYS has more resistance than an oil with a lower kinematic viscosity. Thick oil on a new engine is pointless unless you're making really high HP on a pro tune.

humm , no ! This is something that EVERYONE does and no I've never seen any sort of power lost of any sort in any of the many cars we've worked on and the many cars I've owned myself . Also , no lose of spool , thats the first time I hear of that .


Spool is directly related to RPM and how quickly you get to that RPM. Amsoil and some of the other brands like motul and what not are known for making oils that rev quicker. The slower your car revs, the longer it will take your car to spool. Its all related, our speed is directly related to our RPM in a certain gear, so to say that it wont affect spool is to say that well known companies like amsoil are full of shit. I've done a few tests of my own with measuring the exact RPM that the turbo spools up in each gear, and I can tell you thicker oil will spool your turbo slower, which I'm guessing is because our turbos use our engine oil as well. However a pro tune can make that unnoticeable through A/F tuning.

currently I have hks drop in, buschur exhaust, ams test pipe, ETS upic, xtreme boost down pipe and a tune. made 333 wheel 320 tq thats before the downpipe and exhaust. I will be getting re tuned very soon and plan on running 5 w 30 probably making around 350-360 wheel and tq. any thoughts?

Sounds like a good plan to me although I'm sure many people will tell you to use a thick oil for some unknown reason.

humm , no ! This is something that EVERYONE does and no I've never seen any sort of power lost of any sort in any of the many cars we've worked on and the many cars I've owned myself . Also , no lose of spool , thats the first time I hear of that .

If thick oil was the best oil then performance cars would come with 60 oil from the factory or every person with a performance car would just switch to 60 weight as soon as they got their car. Even 50 weight isn't good for flow meaning all the parts of your engine will not receive adequate oil. Thicker is not better.

4B11 motor has fairly tight tolerances so thicker oil does not necessarily mean more protection, it could mean less if some parts starve.

If you don't change (increase) the bearing clearances, why would you think a thicker oil is indicated?

Exactly.

And I just want to remind people that the engineers who make our engines and decide on the proper oil are not idiots. Even the new Porsches, ZO6's and the new GTR's come from the factory with Mobil 1 0w-40 which is the next step up from the Mobil 1 0w-30 that I use. So even with that kind of power they use 40 weight. Anything above that is overkill unless you're making crazy power.

i just bought signature series 0w-30 from amsoil. Woot. It was reccomended to me by a vendor on the "other" site and it seems pretty popular over there.

i just bought signature series 0w-30 from amsoil. Woot. It was reccomended to me by a vendor on the "other" site and it seems pretty popular over there.

Yeah that one is awesome. Where did you get it and how much did it cost you?

Yeah that one is awesome. Where did you get it and how much did it cost you?

i bought 5 quarts of oil, 3 quarts of amsoil tranny fluid and the oil filter and shipped in 3 days and it came out to 135

If thick oil was the best oil then performance cars would come with 60 oil from the factory or every person with a performance car would just switch to 60 weight as soon as they got their car. Even 50 weight isn't good for flow meaning all the parts of your engine will not receive adequate oil. Thicker is not better.

When it comes to oil you will hear 100 answers to a single question so , its best to get many ideas on the table and then use the one that best fits your needs .