AnswerID: 19103 Submitted: Sunday, May 04, 2003 at 18:34
Old Jack
replied:
yes there is a upper cylinder head lubricant call "valve master", it is used in the normal lead replacement pertrol (LRP) recommended that worked motors, high duty(towing etc.) that you add extra to the tank. go to any shell servo & they will have it, if you have a High compression engine use the optimax + the correct dose of addative for the duty your motor is being used for & you cant go wrong. on the other hand if it's running ok on LRP (not Pinging etc.) it could be a waste of money.
most 4WD use lower compression engines to start with so upping the octane by using 96-98 fuel makes very little differance.
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