Maruti, Toyota Say E20 Has Not Raised Engine Wear Or Insurance Claims

India’s shift to E20 petrol has worried owners of older petrol vehicles about engine life, repair bills and motor insurance. Maruti Suzuki and Toyota Kirloskar Motor say their tests and service data have not found abnormal wear or higher insurance claims from the blend.

E20 contains 20 per cent ethanol. For owners, the question is whether it can mean a large maintenance outgo or an insurance dispute. The companies’ reading is reassuring, but fuel bills and service records matter if a fuel-system problem emerges.

What The Service Data Shows

Maruti Suzuki said it serviced more than 2.5 crore vehicles in FY26, including over 1.5 crore older-generation cars. The company said it had not observed unusual corrosion, premature wear or a reduction in engine life that could be tied to E20 petrol, according to a recent report by NDTV.

“We have tested E10 cars which were prevalent before 2023 on E20 fuel for all parameters, and we have not found anything of concern,” says Rahul Bharti, senior executive officer, corporate affairs, Maruti Suzuki.

The company said E20 use in E10-designed vehicles had not raised a significant concern in its observations. However, it acknowledged that ethanol’s lower calorific value can affect running costs through reduced mileage.

“People who use E20 that are complaining about various issues could be related to fuel adulteration,” says Bharti.

Maruti estimates that moving from E10 to E20 could cut fuel efficiency by around three to 3.5 per cent. Toyota puts the likely decline at around three to four per cent. The effect will depend on mileage, distance travelled and upkeep.

What It Means For Insurance And Maintenance

Toyota said it too had not seen higher dealership complaints or insurance claims attributable to E20. It said fuel contamination, which predates E20, is a more likely explanation for some reported vehicle problems.

“E20 is the standard fuel that will be available, and it is compatible with old vehicles and new vehicles,” says Vikram Gulati, country head and executive vice-president, Toyota Kirloskar Motor.

“The issue was due to fuel contamination. Our inspection confirmed that there was no damage to any vehicle component or its fuel system,” says Gulati.

Using E20 alone does not invalidate motor insurance, but it does not turn every repair into an insurance claim. Policies apply exclusions for routine wear and tear, mechanical breakdown and consequential damage. Owners facing sudden fuel-related failure should preserve the fuel invoice, job card, diagnosis report and photographs, and promptly notify the insurer and authorised workshop.

For older-car owners, regular servicing, refuelling at reliable outlets and acting early on rough idling, poor pickup or repeated starting trouble remain practical safeguards.

FAQs

Can older petrol cars safely use E20 fuel?

Maruti Suzuki and Toyota say their tests and service data have not found abnormal engine wear, corrosion or reduced engine life linked to E20 use in older vehicles.

Will using E20 petrol affect my motor insurance claim?

Using E20 alone does not invalidate motor insurance. However, claims for routine wear and tear, mechanical breakdown or consequential damage may still be excluded under the policy.

What should I do if my vehicle develops a fuel-related problem?

Keep the fuel bill, workshop job card, diagnostic report and photographs. Inform the insurer promptly and get the vehicle inspected at an authorised service centre.