Hi, i checked with Chevrolet service center if i can use E-10 on my 2003 Optra. The service rep told me that they only recommend E-10 to 2004 and newer models. When asked what will happen to my car if i try to use E-10, he said performance will dip by a significant percentage (my understanding - you need to step on the gas harder to get the normal speed you want on a non-E10 gas). I want to get opinion from folks here in the forum on their experience and thoughts on using E-10 on Optra'03 models. Thanks.




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