Piumal Kulasekara

Hi Experts, I am wondering which engine oil should be a better one for a 1KRFE engine (Toyota Vitz KSP130) which has a 120,000km milage? So far I have been using 0w-20 since it was the recommended one on the user manual but I've heard from one of the engine mechanic that I should be using 5w-30 since the engine has this higher milage. So far from the info I gathered over the discussions and the internet (yes the most trusted one 😛 ) 5w-30 is also okay to use since we are in a hot climate and it is somewhat better in lubricating due to the thickness in oil. But is it the right thing to do now? If I increase from 0w to 5w, then there is no going back to 0w again. Can someone please help me with this? TIA

I have 2016 Vitz ksp130 and I bought it recently. An engine tune up was recommended by Sterling so I went for it. I was butter-smooth before I handed over to them. They done an engine tune up and a full service. As soon as I start driving I noticed a stiffness in steering wheel and I informed them right away. They checked again with a scanner but there were no issues found. Since it was butter-smooth before, now I can feel it well. 😐 Any idea why this is occurred? 🤔 Wheels are aligned after this. but issue still exists Tire pressure checked. No error visible for the scanners. Checked from multiple places PS: I am a noob in automotive industry 😶