- Hi, I got a suzuki swift (japan import) 2007 with the k12b engine. It’s got 147000km (90000 miles). When I bought it I took it for an oil change and my mechanic used shell helix hx7 10w40. I told him isn’t that a little too thick for that engine? He told me first of all that it’s got some mileage on it and the second thing is that where I live it gets pretty hot like 40 degrees celcius. I wasn’t sure so I told another mechanic and he said the same thing. Were they both right or not? Thanks
Yeah and that old thing that's fine and that hot climate
Thanks very much Scotty!
The owner's manual will usually specify the weight of the oil based on ambient temperature. I usually use 5w30 in the winter and 10w40 in the summer, per my owner's manual.
The thing is that I don't have my owner's manual since i bought it second hand. I don't know where I can find it since it's a japan import
Generally, the hotter the weather, the thicker the oil used. If you can't find your owner's manual on line somewhere, go with your mechanic's recommendation.
If I switch to 5w30 or 5w40 will my car start burning oil?
Highly unlikely, but I would use 10w40, not 5w40.
Thanks very much for your answer once again. I have another question. Since the 10w40 is semi synthetic should I opt for a fully synthetic oil like 5w40 or 5w30? I’m sorry if I sound foolish but I’ve searched many forums and I got mixed answers
I personally wouldn't waste my money on full synthetic oils for a 14 year old car. The so called "high mileage" blend is just fine.