Daily Telegraph (UK): Honest John's Agony column: “Switch to - and stick with - Shell Optimax. It might cost more than the stuff you've been using, but there are valid reasons for that.” (ShellNews.net) 13 Nov 04
Your questions answered by the dealer you can trust
Our K-reg Saab 900 XS has developed an impossible-to-diagnose fault. Its engine begins to lose power a minute or two after running normally. It feels as if the brakes have suddenly been applied. A warning light comes on and the manual indicates a fuel-injection problem. The garage has checked everything, including the ECU, but the problem remains. We started using supermarket petrol about three months ago. Could that have had any effect?
K.J., Isle of Wight
There's your culprit. Switch to - and stick with - Shell Optimax. It might cost more than the stuff you've been using, but there are valid reasons for that.