Low Octane Gas? Bad Smell.
 

Hi,

Can using low octane gas make the Cathlytic Converter smell real real bad?

Thanks,
Ben

RE: Low Octane Gas? Bad Smell.
 

No. It's not the grade of gas but the formulation that causes the stink. Some gas has a high concentration of particular chemicals that react in the catalytic converter and cause a sulphur buildup at highway cruising speeds that smells like rotten eggs during acceleration.

Change to a different brand of gas. It may help, it may not. Keep changing brands until, hopefully, it quits stinking.

RE: Low Octane Gas? Bad Smell.
 

Ok thank you!

RE: Low Octane Gas? Bad Smell.
 

i also have encountered such cars.

i know that nothing is wrong with the engine.

out of curiousity, i've tried to lean or enrich the mixture, but it still smells.

next time i will advise them to fill on different brand.