EPnick22 Posted March 21, 2014 Share Posted March 21, 2014 as above, was thinking about it after seeing a lot of people using it,.but why? ive always used 10w40 semi synth. surely 5w40 would thin out more when hot causing lower oil pressure? Quote Link to post Share on other sites
nEP71n Posted March 21, 2014 Share Posted March 21, 2014 I use thicker stuff .... it thins out over time any ways Quote Link to post Share on other sites
DevonGT Posted March 21, 2014 Share Posted March 21, 2014 as above, was thinking about it after seeing a lot of people using it,.but why? ive always used 10w40 semi synth. surely 5w40 would thin out more when hot causing lower oil pressure? It would be thinner when cold and the same thickness when hot as your 10w40. Quote Link to post Share on other sites
AdamB Posted March 21, 2014 Share Posted March 21, 2014 5w is ok in the winter and offers greater start up protection, but most of the time 10w40 would be better. The closer the ratings the better really as its more stable and predictable. Quote Link to post Share on other sites
jayc-glanza17 Posted March 22, 2014 Share Posted March 22, 2014 I run 5w-40 and its fine.. but I run fuchs ester synthetic race spec oil, which some cant justify the cost.. but as adam stated above, the 5w will offer greater start up then the 10w.. Quote Link to post Share on other sites
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