moving from 10w-40 to 5w-30. isit okay?

[Mikecivic78]

living in Brisbane I use Nulon 10w40, so called fully synth. A lil better than OEM 10w30. For DC2 use similar viscosity and change regularly and u'll be fine.

Do not use 15w50.

In regard to OP, if you switch from 10w40 to 5w30, you may get some oil seepage (sump gasket/other seals)that wasn't there before due to thinner oil

[Super-DA9]

i also use 15w-50 in my dc2. just so you know, it's no thicker then a 15w-40, which is a medium viscosity oil. the 50 means it has a better film strength.

it's normal for a lot of engines from the 90's to run 15w, as they have a bit of age on them. and it's only one step up from FEO which is 10w.

it's not as thick as some are stating. for those of you that may not understand how oil reads, the first number with the "w" is the thickness, and the second number only represents the film strength. you could use a 10w-70 and it wouldn't be any thicker then a 10w-30, only stronger.

also if someone can tell me exactly how a 15w oil can do actual internal damage or more wear then an oil that's too thin, with a provided example. please go ahead, as I can't understand why this would happen.

the only disadvantage I can think of for a slightly thicker oil is slightly less power (maybe -4kw max) and slightly worse fuel economy.

[anzai]

i also use 15w-50 in my dc2. just so you know, it's no thicker then a 15w-40, which is a medium viscosity oil. the 50 means it has a better film strength.

it's normal for a lot of engines from the 90's to run 15w, as they have a bit of age on them. and it's only one step up from FEO which is 10w.

it's not as thick as some are stating. for those of you that may not understand how oil reads, the first number with the "w" is the thickness, and the second number only represents the film strength. you could use a 10w-70 and it wouldn't be any thicker then a 10w-30, only stronger.

also if someone can tell me exactly how a 15w oil can do actual internal damage or more wear then an oil that's too thin, with a provided example. please go ahead, as I can't understand why this would happen.

the only disadvantage I can think of for a slightly thicker oil is slightly less power (maybe -4kw max) and slightly worse fuel economy.

*waits for bludger's entry*

[khanguskhan]

Nooo Super-DA9 you are wrong, I just found out from this topic 15w-50 makes the car go explogooooo. My DC2R cannot handle 15w-50.

[Super-DA9]

well I work in an auto retail store so it's part of my job to know about oil, but if I'm proven wrong it'll be some learning for me anyway.

[khanguskhan]

its ok i'll hold your hand, we'll go through this together ^^

[Super-DA9]

Nooo Super-DA9 you are wrong, I just found out from this topic 15w-50 makes the car go explogooooo. My DC2R cannot handle 15w-50.

haha, well I've been running 15w-50 with 0 problems ever since adrian at toda recommended it to me, because my car was losing a bit of oil past 7000RPM on 10w-40 a while back, it wasn't much but i still wanted to minimize my oil consumption.

[Mikecivic78]

lolz.

[SuperJDM.]

well I work in an auto retail store so it's part of my job to know about oil, but if I'm proven wrong it'll be some learning for me anyway.

well then theres nothing for us to say... you know er thang

[hmetro24]

What ever oil you use in your car, if you start the engine and drive straight away, that's will ruin the engine. That's what i see every body do.
I would use corn oil in my engine.

[Super-DA9]

well then theres nothing for us to say... you know er thang

come on dude thats a bit cold to pay me out about my job. the reason behind that comment is that i need to know about it so I can recommend the right oil to the people that ask, which is like 15 people a day, all with different cars.

i'd rather get some knowledge or share some knowledge out of this then be in a crap arguement, which seems to be what people are expecting to happen...

[SuperJDM.]

come on dude thats a bit cold to pay me out about my job. the reason behind that comment is that i need to know about it so I can recommend the right oil to the people that ask, which is like 15 people a day, all with different cars.

i'd rather get some knowledge or share some knowledge out of this then be in a crap arguement, which seems to be what people are expecting to happen...

im sure people here are glad to lead you into the right direction BUT to me it seems like you're not keen to listen to what people have to say because you work @ a auto bla bla