Old cars used to have lead added into the fuels as a cushion for the valve seats as the valve seats weren't hard enough to withstand the pounding. Without lead, the valve seats would become so hot knocking would occur.

Then in the early 80's lead was found to be cancer causing element. They banned it in all products from cups to wall paint and yes petrol.

All engines before that time had to have their valve seats changed to withstand unleaded petrol.

So when you use unleaded petrol on a leaded cylinder head then you have to by an additive to mix by the tank. Otherwise you can send it to certain companies that change valve seats. People who deal with classic cars should have contacts for these companies.

I got to know that the car actually changed to a second hand engine car. I don't know what is the original engine model but I do know the current one 3A-U.

this time I going to try pumping Ron92 to see how far can I go

0.21 sen for city driving ??? it's quite ok lor even for a corrolla.....

u still get about 9++km/liters out from ur car......... not bad

my life is full with traffic jam

everyday go to college JAM JAM JAM

which road you use everyday?

i travel to work also very bad. every turn is jam.

I am from cheras, near taman maluri. have to use loke yew then to federal highway. another choice is use MMR2 to kesas then to LDP. also jam like nobody's business. so since both ways also jam......i opt for the loke yew + federal highway one. no need to pay RM5.00 per day.

ok la .. this soon going to change to a chatting thread. I better close it before it get worst

I got my answer , thanks