- Buick Ownership
- 2018 TourX Essence
Hi Folks, I've got a whole 550 miles on my Smoked Pearl / Shale 2018 TourX and just put my first gas in the vehicle. I ALWAYS use Top Tier gas and have for years as recommended ( TOP TIER™ Gasoline Brands ) but I am not at all convinced that the TourX requires premiium for general use (not towing, not involved in a sporting event ;-) , or operating at outside temperatures below 90 degrees F. While I'm sure that the edge of the performance envelope might be affected and perhaps MPGs by a small percentage I'm not excited about buying 93 octane fuel which is running about 20% more give or take than 87. The MPG differential is certainly not going to make up for that cost and since I'm operating primarily in northern New England I'm also not concerned about the increased volatility of 87 octane unless I'm working the car in high temps. I may use 93 from time to time in the summer or when I'm towing. My experience with modern power plants tells me that they are more than capable of making the needed adjustments. I'd like to hear how the rest of you feel about that and what you are using in the tank. I'm no genius but more familiar than many with cars of all kinds as a small time collector and long time high performance club driving instructor. Full disclosure, my other GM products are currently a 1967 Camaro SS/RS 350, and a 1964 Pontiac GP 389 with factory trips.