The Swindon motor dealer has been providing answers to its customers after being flooded with E10 petrol enquiries.
The new petrol, which is deemed more environmentally-friendly, started being introduced to filling stations on Wednesday September 1.
The fuel is said to contain less carbon and more ethanol than fuels currently on sale.
E5 contains up to five percent ethanol, with the other 95 percent being regular unleaded petrol. E10 contains 10 percent ethanol – bringing the UK's fuel grade in line with countries such as France and Germany.
This week, staff at Suzuki and Hyundai motor dealer Pebley Beach have been fielding calls from motorists worried that their car will not be able to run on the new fuel grade.
Managing director Dominic Threlfall said: "Every petrol vehicle built after 2011 should accept E10, while every Suzuki car from 2001 onwards (Y registration) and every Hyundai from 2003 onwards (03 registration) is E10 compatible.
"Drivers of Suzukis manufactured before 2001 or Hyundais manufactured before 2003 can check with us if they are worried.
"The solution for those small numbers of drivers behind the wheel of a non-compatible car is to switch to super unleaded."
Mr Threlfall was also asked about the repurcussions of a driver of a non-E10 compliant car filling up with E10 by mistake.
He said: "It is nowhere near as serious as filling a petrol car with diesel! Simply drive or drain the tank to two-thirds full, top up with super unleaded, and everything should be fine."
The Government has published an online tool for drivers worried about E10 compatibility.
It can be found at https://www.gov.uk/check-vehicle-e10-petrol