I recently went to my Maryland state emissions test. My vehicle failed the "hydrocarbon" part of the test.
Our state standard is: 2.8000 GPM
My vehicle came in at: 3.0080 GPM
I usually take the test with a tank of "93 octane" gas, and I have always passed. This time I took the test, with a tank of "89 octane" gas, and failed.
For this question, I'll assume that the engine and emissions system are working properly.
I wondered whether the octane amount in the gas would influence the amount of hydrocarbons in the exhaust?
Does higher octane mean less hydrocarbon emissions in the exhaust?
Should you always take an emissions test with "93 or 94" octane gas?
Does the brand of gas effect hydrocarbon levels?
Any ideas anyone?
Thanks in advance!
Our state standard is: 2.8000 GPM
My vehicle came in at: 3.0080 GPM
I usually take the test with a tank of "93 octane" gas, and I have always passed. This time I took the test, with a tank of "89 octane" gas, and failed.
For this question, I'll assume that the engine and emissions system are working properly.
I wondered whether the octane amount in the gas would influence the amount of hydrocarbons in the exhaust?
Does higher octane mean less hydrocarbon emissions in the exhaust?
Should you always take an emissions test with "93 or 94" octane gas?
Does the brand of gas effect hydrocarbon levels?
Any ideas anyone?
Thanks in advance!