WTK: 1997 Mitsubishi Legnum with 4G93 DOHC 16 Valve GDI Oil

[DeepThought]

Hello,

I would like to know what is the best oil for my 4G93 DOHC 16 Valve GDI engine in my 97 Legnum.
I have searched far and wide on this forum and the internet but the only similar threads are for the Lancer CS. I just bought a nice looking foreign used engine and I dont want to sludge it.

So far this is what I came up with... (for our climate)
SAE 20w40 / 20w50
SAE 15w40 / 15w50
SAE 10w40 / 10w50

Do I use full synthetic, semi or mineral oil?
How often should I change my oil?
Any recommended brands for oil/filter?

Any help will be appreciated.
Alex

[Menace3.0]

Hi DeepThought

It depends on the mileage of the engine. You know if it was rebuilt, 60,000 mile service, etc.

With that being said, once you can verify that the engine on the whole was maintained according to the manufacturer's specs., for e.g. oil change at 10,000 miles or two to three months use the 10w40 or 15w40. Even if its a recently bought engine...as you indicated, you can use the 10w40 mineral oil.

However, I would suggest that you service the engine first....timing belt change, water pump, front & rear oil seals, cam seals etc. run the mineral oil, and after the first oil change switch to a full syntec.

You should change your oil as per manufacturer's specs...in your case every 10,000 to 12,000 miles or 20,000 km or 2 - 4 months depending on vehicle use.

Mineral Oils you can used:
Castrol
Shell Helix

Synthetic Oils:
Amsoil

[de_dougla_smurf]

Agree with Menace on the Shell Helix HX5. 20W 50.

Last oil change, I tried Valvoline premium 20W 50 and the tappits began making noise.

Will revert to the Shell.