Conventional to Synthetic???

[Crazychopstick]

I was at a quick lube and when they changed my motor oil they replaced it with 10W-30 Mobil synthetic instead of the conventional oil that I had.

Question: Is it okay to just replace conventional motor oil with a synthetic without a flush or anything?

Thanks, Chris.

[KLS]

No problem. If you get some increased oil consumption, ride it out. It'll return to normal. You might change this fill at 5000, then go 7500 if you stick with synthetic. Mobil 1 synthetic is an excellent oil. If they used Mobil synthetic blend, no big deal. It is fine oil, but not worth the price difference of conventional oil.


Ken

[uracowman]

i just also switched from non synthetic 3 days ago to mobil 1 synthetic 5w-30 at walmart.what benefits do i get from synthetic?

[KLS]

--Much better cold flow so better lubrication before the engine gets warm...more a Minnesota concern than a Texas concern.
--Resistance to oil oxidation and other oil degradation from very hot operation.
--Thins less when very hot.
--Slightly better fuel mileage.
--Cleaner engine over the long term.
--Longer oil life...at least the full interval shown in your owner's manual http://neptune.spacebears.com/cars/stories/mobil1.html
--PAO synthetics have higher film strength than conventional oils (including Group III "synthetics") for more engine protection.

I'd use 10W-30 oil in your Texas climate, and maybe an oil like Mobil 1 5W-40 "Truck & SUV" oil if you work the engine hard & hot. These probably give better protection after several thousand miles in the engine. The 5W-30 would be my cold winter choice.


Ken

[fooddude]

-Less(or no) oil sludge when engine gets really old.
-No oil "coking" inside oilpan/block/heads.