Please see below a comparison between the major oil and gasoline ETFs, USO and UGA:
6 months: gasoline +51%, oil +26.3%
2 years: gasoline +4.67%, oil -45.6%
This is terrible performance for the oil ETF in the longer time frame. While it's coming off the oil peaks of 2008, the ETF still performed worse than the price of oil. West Texas peak price was $147.x in 2008; today it's prices at $112.80 or so, that is a drop of about 30%.
There is no question that the gasoline ETF, UGA, was the better choice.