switched from conventional oil to synth 0w20 - questions

[josh044]

thanks, also - FYI - I'm sure this is partially in my head, but the car seems to be running better now. Smoother, a bit more responsive. Who knows though, maybe it's all in my imagination. I'll see how the mpg responds, previously I'm been nearing 40mpg.

[marcus]

Originally Posted by josh044

thanks, also - FYI - I'm sure this is partially in my head, but the car seems to be running better now. Smoother, a bit more responsive. Who knows though, maybe it's all in my imagination. I'll see how the mpg responds, previously I'm been nearing 40mpg.

not your imagination although previous owner might have it at 5w-30 which was thicker..

[bronsin]

Originally Posted by josh044

thanks, also - FYI - I'm sure this is partially in my head, but the car seems to be running better now. Smoother, a bit more responsive. Who knows though, maybe it's all in my imagination. I'll see how the mpg responds, previously I'm been nearing 40mpg.

Correct. I recently drove my Yaris to Alaska and back from NJ. Going to Alaska I had regular oil in the engine. In the parking lot in Walmarts in Fairbanks I put in Mobile One. Gas was $6-7 a gallon in northern Canada and I hoped to recoup the money spent for the synthetic.

There was no change in mpg and I was very careful about the calculations.

Your car will be fine. Theres no need to "flush the engine" with more oil.

The benefits of synthetic oil are all in the head. It WILL make starting easier in very cold weather and might flow better initially.

BTW I would be using 5W-30 per the owners manual if it was my car. Others have used 0W oil without a problem though.

All this is just my opinion of course.

Except the mileage improvments claims.