best synthetic oil and m/t oil??

[The Sin]

I recently started a new job as a courier. I drive about 10,000 miles a month. I'm getting my oil changed every two weeks. I want to make the switch to synthetic. I'm thinking of going with Amsoil SAE 0W-30 Signature Series. According to the manufacturer, I can go 25,000 miles on each oil change. Does anyone have any input on this? Anyone else travel high miles like me? If so, what do you use? When I make make the switch, should I do a flush? I have just a little over 50,000 miles on my 2010 Yaris.

[Happy Little Pony]

Amsoil is a perfectly fine choice. If it were me, I'd run out to 7 or 8 thousand miles and then pay for an oil analysis test. That's the only way you can be sure that the oil is holding up well in your particular application.

Another thing to consider is that Amsoil says the oil will hold up for 25,000 miles, but the oil filter they spec for the 1NZFE is only rated for 15,000 miles.

[Hershey]

Originally Posted by The Sin

I recently started a new job as a courier. I drive about 10,000 miles a month. I'm getting my oil changed every two weeks. I want to make the switch to synthetic. I'm thinking of going with Amsoil SAE 0W-30 Signature Series. According to the manufacturer, I can go 25,000 miles on each oil change. Does anyone have any input on this? Anyone else travel high miles like me? If so, what do you use? When I make make the switch, should I do a flush? I have just a little over 50,000 miles on my 2010 Yaris.

Someone we know drives about 40,000 miles a year with his 2010 YARIS 3 door bought in October of '09 and gets his oil changes at the local TOYOTA service center . Would think that oil to be MOBIL 5w-30 . Car runs fine as I know . If you want a synthetic , I'd say Pennzoil Platinum or the ULTRA when on sale or at local WAL-MART in a 5 gallon jug at around $26 . As for a conventional , the PENNZOIL yellow bottle is a stellar oil or the TOYOTA oils at your nearby TOYOTA parts department . These in a 5w-30 would be good for 5,000 > 7,500 mile O.C.. To keep your warranty until the 60,00 mile mark you'll need to get it changed every 5,000 miles . If not a concern , then a synthetic would be best value for a 7,500 > 10,000 mile interval . Let us know what you decide .

[daf62757]

Originally Posted by The Sin

I recently started a new job as a courier. I drive about 10,000 miles a month. I'm getting my oil changed every two weeks. I want to make the switch to synthetic. I'm thinking of going with Amsoil SAE 0W-30 Signature Series. According to the manufacturer, I can go 25,000 miles on each oil change. Does anyone have any input on this? Anyone else travel high miles like me? If so, what do you use? When I make make the switch, should I do a flush? I have just a little over 50,000 miles on my 2010 Yaris.

You might be past the point of no return with respect to regular oil. I tried to switch my step daughters car over to pure synthetic and it resulted in oil leaks. The syn oil is so thin it seeps between the seals. Her car had over 100K miles so maybe yours is not too far gone. You can use the high mileage oil with is 50/50 regular and syn.

You can try 100% syn and see if it results in oil leakage. If not, go for it.

I personally use Mobil 1 0w20 and change at 10K. I have almost 60K and never had any problems.

AMSOIL is very expensive! You can usually buy Mobil 1 at Advance Auto on sale and get 5 quarts and an oil filter for around $25. After four or five of those, you have enough left overs for a free oil change.