werewolf

Hi

I am changing the oil on a recent purchase of mine, a used 1998 GS400 with 114K miles.

I don't know if the previous owners used synthetic or dino oil, so I am thinking of running a syntho-blend of 5w30 just in case.

What do you think? Which brands do you recommend or would avoid?

The local shop wants to use Quaker State blend for the service...

Thanks

Teal Sc400

werewolf, Mobil 1 Extended Performance 5W-30 or Mobil 1 5W-30 and put in a Mobil 1 Extended Performance oil filter too.

http://www.mobiloil.com/USA-English/...Oils/Oils.aspx

Rollin'ES3

Whats the difference between the Extended Performance from Mobil 1 5w-30, and just the regular Mobil 1 5w-30?

The price is always a dollar or so higher on the Extended Per. Does anyone know whats in it? Ive never read the back to figure it out.

Shawnmack

Mobil 1 ext. says you can go up 15k before your next oil change.

Rollin'ES3

I know that but I was wondering whats the difference between them both.

They are both FULLY synthetic. I was wondering more along the lines of ingredients. Just curious as I always am If any oil freaks know.

RTIS250

iTrader: (9)

Its probably just a more complex additive package. Amsoil has had synthetic oil that can go 10k+ miles for a long time. I personally would never go that long. Im a 5k mile oil change guy.

I would just stick to regular Mobil 1 5w30 if you want synthetic. I use regular 5w30. My car has 172k miles on it and counting, with no engine problems.

GSteg

iTrader: (15)

In addition, I wouldn't leave an oil filter in that long anyways. I guess you can change the filter at 5k miles or something, and then top off the oil, but then again, why not just do a full change since you're there anyways

Rollin'ES3

Cant argue there. I'm so paranoid I change mine out every 4.5k

GSteg

iTrader: (15)

<---1.5k mlies here


dont ask

RI-Lex

iTrader: (4)

im doing mine tomorrow, i use mobil 5000 regular blend 5w-30, but usually change before 4k anyways

Rollin'ES3

Sorry but I must.......why

What type of oil do you use? What kind of conditions do you drive through?

sonyman

Wrong. Neither is fully synthetic. Mobil 1 contains at least some group III base stocks, which are NOT synthetic. Synthetics are group IV and V basestocks. As far as group III oils are concerned, Pennzoil Platinum is currently one of best on the market. For a true synthetic (group IV), Amsoil is king.

dung0981

iTrader: (1)

3k for mobil 1

mitsuguy

iTrader: (2)

Mobil 1 here as well... tried Royal Purple, and noticed a little more top end noise than with the Mobil 1... Going to switch back...

Mobil 1 may be partially group 3, but it is still an excellent oil that is definitely more readily available than most others...

kit cat

iTrader: (6)

15k? Even if Mobil1 recommends that, that'll scare me.