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Discussion Starter #1
I bought my 99 corolla w/ 111,000 miles. I have a co-worker who has a 2000 corolla and he has over 300,000 miles on it. he recommended the following and I want to know what you guys think:

1) buy a quart of marvel mystery oil at Kragen and pour it into the engine and run it for 500 miles. supposedly, it will clean the engine up. Then change oil with the following:

2)
get the Tough guard Fram and add 3 quarts of 20-50 synethic and 1 quart of slick 50. He said to change the oil every 5 to 6 thousand miles.


he recommended the better filter because pump doesn't have to work as hard and there's better flow AND filtration. What kind of filters do you guys recommend? OEM or is the tough guard better / worst?

3)
I'm not too sure about the 20-50 synethic.. i'm thinking about giving my 111,000 miles car 5-30.

4)
Does pouring in different weight oil affect the timing chain? The reason I ask is because I hear the oil is used to presure the timing chain / guide. ..so in theory, the wrong weight plus the wrong type of filter may affect the timing chain pressure---so won't this cause quick wear and tear to the timing chain?

he says he typically gets 400+ miles on a full tank on his corolla 2000.


5) will the slick 50 cause harm to the engine where it the teflon coats certain parts of the engine ..etc..

Thanks,
Gordon
 

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20W50 is way too thick of an oil for a small lightweight engine like the Corollas. Your fuel economy will suffer
immensely. Stick with the what's recommended in the owners manual. Oil additives are completely unnecessary as long as you change your oil on time. As far as quality oil filters go, stick with OEM, Purolator PureONE or Napa Gold/Wix.
 

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Discussion Starter #3
I agree w/ you, but I don't know why my coworker would tell me such.. especially about the part where he tells me there's no need to change the engine oil for 50,000 miles. I made sure I repeated myself to him a few times.. the reason why i post is .. is there any possibility what he's telling me is possible? The guy said he'll try to see if he can get by with 100,000 miles before changing engine oil with his recommended combination. i also questioned him about the fuel economy and he says he's getting like 32 in the city and much more on the freeway.

what i want to know is, is it at all possible from what he's telling me? he says to make sure to get all the gunk out first.. to him, that is critical. then he said because of the heavier weight, and the slick 50, it provides the extra protection and slipperines and therefore minimal wear.

I just can't get my head around what he's telling me.

Thanks,
Gordon

20W50 is way too thick of an oil for a small lightweight engine like the Corollas. Your fuel economy will suffer
immensely. Stick with the what's recommended in the owners manual. Oil additives are completely unnecessary as long as you change your oil on time. As far as quality oil filters go, stick with OEM, Purolator PureONE or Napa Gold/Wix.
 

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yea its possible he is telling the truth. he is just lucky if he is telling the truth and is on the verge of failure. your friend obviosly thinks he is smarter than everyone, and he is not. i would not listen to his advice on cars ever. no matter what oil you run you need to change it at 5000 miles if its a good synthetic. even the oil companies will tell you there oil is not good that long thats why they suggest you change it at 5000 miles.

also on the oil filter fram makes terrible oil filters. the tough gaurd is decent but there are alot better out there... amsoil, mobile1, wix, napa gold, car quest blue, pualotor, pure one. run any of those and you will be fine. but they wont last 50,000 miles either so change it with your oil. if he is running that long on one oil filter the filter is no longer doing anything and his oil is filling up with more and more metal shavings.
 

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Discussion Starter #5
I completely agree w/ you. no doubt, but i can't help but to find his story interesting. his theory is that since the color of the oil is very good, he never bother changing it because the slick 50 and synthetic is so slippery that there's no friction. you're right that there's a good chance his engine filter may have torn, and he might as well not use a filter! :) I've read that it's possible for slick 50 to clump up and therefore gets trapped in the filters.
 

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Discussion Starter #6
did you guys know that i can buy $4/ genuine filters from the dealer for my 99 corolla..assuming i buy 3+. in this case, why would i want to buy other brands.




20W50 is way too thick of an oil for a small lightweight engine like the Corollas. Your fuel economy will suffer
immensely. Stick with the what's recommended in the owners manual. Oil additives are completely unnecessary as long as you change your oil on time. As far as quality oil filters go, stick with OEM, Purolator PureONE or Napa Gold/Wix.
 
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