January 15, 201610 yr 10w40 to 10w50 I'd say with being tuned. I always say it is best to have your own brand you want to use oil has been on some forums a huge debate and arguments lol. But worth maybe having a word with Tim on here from http://www.opieoils.co.uk/
January 15, 201610 yr Author Cheers for that mate I have just had a look I think I will get 10w40 had a look on scoobyworld and they use 10w40 shell ultra. I will try and book them tickets tonight if not tomorrow
January 16, 201610 yr My 2003 WRX has been mapped to 280bhp. Pour oils recommended 5/40. However I have just installed a oil temp gauge and it seems to be burning hot. I always use millers Sent from my iPhone using Tapatalk
January 16, 201610 yr I'd use 10/40 myself but if you're happy using that it's fine and if it was recommended by the mapper they have seen the readouts what it's doing :)
January 17, 201610 yr The only difference with the 5/40 oil compared to 10/40 is its a bit thinner for cold starts so your engine shouldn't be running any hotter with this in and the 40 is the thickness when hot..has it been changed regularly as oil in a turbo car can break down quicker than normal...?which could explain temp...? what temp was it after a normal slightly spirited drive as we love to do!
February 16, 20169 yr I use Millers 10-60NT in my Honda as it's proper wound up and see's a lot of heat but I'll be using 5-40 synth in my OEM WRX over the winter months.
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