# Top Tier Gas vs Premium Gas: Key Differences Explained Understanding the additives and benefits of Top Tier fuels. - **Source:** [SlashGear](https://www.slashgear.com) - **Published:** 2026-09-27 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/c57fff78-340f-420b-99d5-5c745b5fc02f ## What is Top Tier Gas? Top Tier gas refers to both gasoline and diesel fuels that meet specific performance standards set by an independent laboratory. These fuels contain a package of additives designed to optimize engine performance throughout its service life. The additives aim to reduce carbon deposits in gasoline engines and improve stability in diesel engines, addressing issues like hesitation, stalling, and injector wear. ## Additives in Gasoline For gasoline engines, Top Tier additives focus on reducing carbon deposits, which can cause hesitation, stalling, and difficulty starting. These deposits also lead to higher emissions and poor mileage. By minimizing these deposits, Top Tier gas ensures smoother engine operation and better fuel efficiency, making it a preferred choice for long-term engine health. ## Additives in Diesel Top Tier diesel fuels include additives that stabilize the fuel, reduce injector deposits, and minimize fuel pump wear. These additives also help reduce water and particulate contamination, which can degrade engine performance. This makes Top Tier diesel particularly beneficial for maintaining the efficiency and longevity of diesel engines. ## Premium Gas Explained Premium gas is the highest octane gasoline available at most stations, typically rated between 91 and 94 octane. While it offers better performance for high-compression engines, it does not inherently include the additives found in Top Tier gas. This means premium gas may not provide the same long-term engine protection as Top Tier fuels. ## Top Tier vs Premium Not all premium gas is Top Tier, as premium fuels from non-Top Tier stations lack the protective additives. However, all grades of Top Tier gas, including premium, contain these additives. Unless your vehicle specifically requires premium gas, using Top Tier regular gas can offer better engine protection without the extra cost. ## Manufacturer Endorsements Several major car manufacturers, including Audi, BMW, Ford, GM, Honda, and Toyota, recommend using Top Tier gas in their vehicles. This endorsement highlights the benefits of Top Tier fuels for engine performance and longevity. While it doesn't guarantee the absence of marketing influence, it adds credibility to the Top Tier standard. ## Switching to Top Tier If you've been using non-Top Tier gas, switching to Top Tier can clean existing carbon deposits from your valves after a few tankfuls. It also improves mileage and minimizes issues like fouled spark plugs and sticking valves. This makes Top Tier a practical choice for maintaining engine health over time. ## Top Tier+ Standard In May 2026, Top Tier announced a new standard called Top Tier+, designed specifically for Gasoline Direct Injection (GDI) engines. Brands like Costco, BP, and Amoco already meet this standard, with more expected to follow. This update reflects ongoing advancements in fuel technology to meet evolving engine needs. ## Sources covering this story - https://www.slashgear.com/2264674/is-top-tier-gas-same-as-premium/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._