gjskerman

Hi Gang,

It has been recommended by one source that I use DENSO IRIDIUM IK20TT plugs in my 1998 Lexus LX470
Another source recommends DENSO IRIDIUM IK20
Can anyone please tell me what the difference is between the two or are they identical seeing that both are twin tipped

Would appreciate an answer

Cheers

Geoff

hankinid

Was the "one source" selling Denso twin-tipped plugs by chance??

I would suggest using what your owner's manual recommends. Iirc, you should see both NGK and Denso part numbers.

I'm not sure what advantage(s), if any, you get with a twin-tipped plug.

If you don't have the owner's manual or a FSM, email me or PM and I'll find the numbers...my 100 series is an '01LX, same engine as yours.

hth

Steve

gjskerman

I should have mentioned that me vehicle is dual fuel - Unleaded petrol / LPG
That said I believe you use different plugs than that recommended in the service manual

Cheers

Geoff

hankinid

So, use the FSM recommended plugs when you're running unleaded gasoline.

I'd think a heat-range or 3 hotter for propane, or split the difference if you run the fuels interchangeably.

I know NOTHING about plugs for a propane fueled vehicle...were I you, I'd make a few calls to propane conversion installers. There are propane conversions in the U.S., but not nearly as many as you see Down Under.