Cos Singaporeans mostly know DEFI(the brand got do advertisment)
& brand like Apaxi & Greddy, HKS its of better quality.NOT
THOSE AUTOGUAGE, RACE TYPE R...TIMAX...(NO OFFENCE)
Why 3 guage i dunno.. but..
1st. petrol need more combustion to gv more power> when more air
& fuel mix> gv more power, thus got 1 meter is air/fuel
ratio> to hv better misture
2nd,oil temp>running tc vehicle is very hot> turbo also use
engin oil to cool down> & when heat in generated in those
powerful engine>scare overheat> soo see the oil temp
3rd, boost meter, to see boost..etc
