synthetic

is it too late to switch from conventional to synthetic oil after the motor has 100k on it? im thinking about doing the change, but im not sure if i could. b15 sentra with sr20de from factory with the car. ive heard of seals and other things happening to if it i do the change. anything to be worried about?

thats about it. if you leak any ANY oil, it may get worse, but i bought my sentra with 64k and switched to synthetic right away. it was fine past 110k. but i had no leaks and no burning.

synthetic oil has different additives that tend to harden seals against the surfaces, instead of making them expand like standard oil. this is fine, but if you leak, it will make it worse.

so if i dont leak now will that mean i will leak soon? im planning on doing the switch this weekend. if i do get a leak from a seal, how much would that cost me approx.?

not all cars leak the same. if you dont leak now, you probably wont leak if you switch and i wouldnt worry. if you develop leaks, its just gaskets or seals that need replacing. its really not that bad. synthetic oil got a bad rap in its early years for causing leaks in cars that used lots of cork seals and such, but its much better now, and cars dont use as many cork seals. the only real thing is its much slicker than standard oil. thats where a lot of leaks happen because of.

in conclusion, if you dont leak now, i wouldnt hesitate to switch to syn.

I switched a 1995 @ 90,000 to mobile1 and I have had no problems at all.

What are some advantages of using synthetic oil? (03 spec v 73k miles)
Should I make the switch?