Quote:
Originally Posted by mlh
Nice article but what they didn’t tell you is most engines are direct injection. The fuel is injected directly into the cylinders and never comes in with the intake valves. It’s like having a bucket of soapy water in your kitchen unless it gets on the floor you are still going to have a dirty floor. Some engines have two injectors per cylinder, a port and a direct injector. Those premium fuel will work on but just direct injected won’t keep the intake valves clean.
What causes carbon on the intake valves is the crankcase ventilation system. It vents gases out of the crankcase and burns it in the cylinders and in doing so carbon is deposited on the intake valves.
Lynwood
|
Correct! Top Tier is FOR DIRECT ENGINE INJECTION.. Not for Fuel injection, or carbs..Top Tier is supposed to keep the Valves from becoming dirty with carbon. Our Hyundai Sonata Hybrid uses an ATKINSON Engine..It operates differently from a convetional gas engine..Convention Fuel injection injects the Fuel on the intake stroke. Direct injection injects fuel at the top of the compression stroke like a diesel does... I have not heard of Top Tier for Diesels.. but will check..Essentially Too Tier is a High Detergent Gasoline.. The Newer Direct Injection engines are squirting gas onto the intake valves to keep them clean..