Before reading this thread i really had no idea what oil to use in my r33 gts-t as its the first performance car i've owned and im still very much in the learning process about most things to do with it haha. but after reading through i'd say i have a pretty good understanding of oil viscosity and how different oils can effect the engine.
coming up to the first oil change i have to do, i've decided a 10w40 oil is probably the best oil to use for my car. as i said its an r33 gts-t with basic bolt on mods making about 250-260rwhp. it's used as my daily doing around 300-400km's a week, and given a bit of a boot every now and then, and its got about 120,000km's on the clock.
i headed to repco in my area to pick up a bottle of motul 300v but decided against it after seeing it was going to cost me over $100 for 4L >.<
i then turned to 8100, but saw it only came in a 5w40 bottle and didnt know whether this would be ok for my engine.
so i wanted your opinions on whether getting a 5w40 oil would still be ok for my car? im not 100% sure how the car was treated before i bought it, and since the engine has done 120,000km's i thought a 10w40 would be the safer choice.
however ive seen a few people on here say that a 5w40 would still be ok for a daily driven car, i'm just concerned about a cold weight of 5 being too thin for the age and mileage of my car.
i was also thinking that because it is now coming into winter with slightly colder temperatures, that a 5w40 would be fine as long as i use a 10w40 during summer?? i dont know how much of an effect our seasons here in perth would have on oil though
im also curious if anyone here knows where there is a Sougi distributor in perth preferably NOR?? from the comments on here it sounds like an awesome oil for a great price, and considering im a uni student id love to be able to utilise this while its still available
thanks in advance!
*edit*
i just read the last few posts about 5w40 vs 10w40 oils while i was writing my reply to this thread..
should i not use motul 8100 then since its a 5w40?