SINGAPORE Petroleum Co has joined the rest of the oil companies in raising pump prices.

SPC on Thursday upped its 92-octane petrol by four cents a litre at 10.30am this morning. Its 95 and 98 grade petrols as well as diesel went up by five cents a litre, a day after Shell, ExxonMobil and Caltex moved their rates.

With the change, a litre of 92, 95 and 98-octane fuel costs $1.637, $1.677 and $1.78 before discount.

The exception is Shell's 92-octane, which is costlier at $1.647 a litre before discount. Shell will be exiting the 92-octane market by end-June, despite protests from the Consumers Association of Singapore.

The Anglo-Dutch group, which has the largest network of refuelling stations here after ExxonMobil, is also the only one retailing the most expensive automotive fuel here.

Shell's V-Power is now priced at $1.959 a litre before discount - 20 per cent more than the cheapest petrols here. Shell said it is the least saleable fuel after its 92-octane.