1998 Mitsubishi 2.4L Viento GDI Legnum

luvlee2, Mar 24, 3:23am
Do these need to run 95/98 octane or should they be okay on 91!

thunderbolt, Mar 24, 3:25am
Not 91. 98 is the best option since we don't have 105 octane here

mrfxit, Mar 24, 3:27am
NEVER EVER run a GDI Mitsi on 91 (long term)
The eco emission systems clog up on anything less then 105 (Japan) but it's a progressive thing getting shorter time spans as you run a lesser grade.

Theres only really 2 fix's for a clogged GDI system.

Get rid of it
Strip it down & CLEAN (heads off/ manifolds etc CLEANED

jfstyle, Mar 25, 6:23am
Min 98 .if feels a little like it surging a little bit the manifold is getting gummed up.only cure is to remove and clean out.if you don't the motor pressures and burns oil and blows oil seals.