Salam to All
I have a 99 civic. I know its quite old but it has a comparatively new swapped D15B.
I was previously using 20w50 mineral oil but as the winter has started i feel that when i start it in the morning the engine feels like struggling hard to rev (feels too heavy) as if the oil is too thick. and as soon as it warms up, all becomes fine.
There is absolutely no mechanical or electrical problem in the car. so we need to discuss oil grades only.
I m thinking to use 5w30 or 10w40 as Honda manual suggest 5w30.
Another doubt is abt the use of mineral or semi synthetic or fully synthetic oil. can i go straight away to synthetics or semi synthetics and then can i revert back to mineral oil without any problem.
as i have read on many blogs/ discussion forums over the internet that switching back to mineral from synthetic is not a good idea.
So kindly suggest oil brand including grading as 5w30 etc as well as suggest to use mineral, semi or fully synthetic oils. thnx