reg oil or synthetic

[99galantES]

Ok so I recently took out my motor and found out my block wasn't in good shape. Now I have a new motor with 112k on it and this motor is clean but I'm putting a head I bought with 90k on I'm putting new water and oil pump, all new belts, seals and gaskets. So I was wondering if I should run reg penzoil high mileage 10-30 or synthetic penzoil platinum?

Also the new motor came with a knock sensor and my old one never had one is that normal?

[keith6110]

run the platinum penzoil 10w-30 the very first time. After 3k miles, just regular penzoil 10w-30.

Thats what I would do. The platinum for the initial break in and cleaning, regular after. I don't believe in high mileage unless the car smokes and all.



The knock sensor thing, I don't know much about the I4 but I believe the 99's did not come with a knock sensor where any year after that did.

[99galantES]

Ok thanks many ppl told me not to go synthetic cuz of the mileage and just use reg oil

[keith6110]

this one lol

http://shop.advanceautoparts.com/wcs...8_pri_larg.jpg

every 3k miles w/ filter of your choice - not fram

[99galantES]

So you want me to use sythetic then switch back to regular oil? And I use K&N never really liked fram

[Galantfan88]

So you want me to use sythetic then switch back to regular oil? And I use K&N never really liked fram

Yes, well even when the winter is coming. Sythetic is a thin layer oil and it would be alot better for when it gets really cold out.

[99galantES]

But I heard once you go synthetic you can't go back to regular oil

[keith6110]

But I heard once you go synthetic you can't go back to regular oil

Lol! Never heard that before. I have heard stick with one brand though.

[Galantfan88]

But I heard once you go synthetic you can't go back to regular oil

No thats not true at all. You can switch oils

[99galantES]

I'm just going to go synthetic then

[kildaremike]

What typically happens with a high quality synthetic oil is that it holds to the metal so well that when you switch back to conventional it cant hold the metal because it still has a light synthetic film on it. I have a fully built motor and I use conventional Valvoline 10-30 in cool/cold temps and 10-40 in hot weather. My engine builder actually told me I shouldnt use anything synthetic until after 3000 miles because the oil is so good, it prevents the piston rings from seating into the walls becuase it lubricates TOO WELL. I know your average piston ring is seated and worn in after a few hundred miles, but im playing it safe.

Also in terms of synthetic Mobil1 is a very affordable brand, thats why most people always suggest it, but if you want the best quality, you want something higher grade like AMSOIL. Royal Purple is kinda in between AMSOIL and Mobil1. I dont too many people who use Eneos, but my friend says he sells a ton of it at his shop, and he uses it in his R33 Skyline GTR with 700+WHP. I doubt he would put crap in that engine, especially after he just spent 10k on a fully built one because he blew a hole in his old block.

Stewi, 06-13-2008, TGC

[Galanttuner10]

i use mobil 1 synthetic high mileage and mobil 1 oil filters. remember that synthetic can last longer than normal oil as well, so it may cost more per oil change but you can usually get more life out of it

[Stewi]

What typically happens with a high quality synthetic oil is that it holds to the metal so well that when you switch back to conventional it cant hold the metal because it still has a light synthetic film on it. I have a fully built motor and I use conventional Valvoline 10-30 in cool/cold temps and 10-40 in hot weather. My engine builder actually told me I shouldnt use anything synthetic until after 3000 miles because the oil is so good, it prevents the piston rings from seating into the walls becuase it lubricates TOO WELL. I know your average piston ring is seated and worn in after a few hundred miles, but im playing it safe.

Also in terms of synthetic Mobil1 is a very affordable brand, thats why most people always suggest it, but if you want the best quality, you want something higher grade like AMSOIL. Royal Purple is kinda in between AMSOIL and Mobil1. I dont too many people who use Eneos, but my friend says he sells a ton of it at his shop, and he uses it in his R33 Skyline GTR with 700+WHP. I doubt he would put crap in that engine, especially after he just spent 10k on a fully built one because he blew a hole in his old block.

Stewi, 06-13-2008, TGC

+1

To this day I still run conventional valvoline oil in my car. There is a HUGE thread over on EvoM about how terrible Mobil1 is. If the motor was meant to use synthetic, it would have had it from the factory. Alot of the high power EVO guys run AMSOIL, Eneos and Bradd Penn. Either way, your spending about $7+ per quart. Again, im still staying with conventional for now........

[RedGalant2k1]

Ok thanks many ppl told me not to go synthetic cuz of the mileage and just use reg oil

But I heard once you go synthetic you can't go back to regular oil

That is a blatant lie.

+1

To this day I still run conventional valvoline oil in my car. There is a HUGE thread over on EvoM about how terrible Mobil1 is. If the motor was meant to use synthetic, it would have had it from the factory. Alot of the high power EVO guys run AMSOIL, Eneos and Bradd Penn. Either way, your spending about $7+ per quart. Again, im still staying with conventional for now........

+1. AMSOil FTW!

[jermyjerm]

Castrol GTX every 5k.Any filter but Fram.My local parts store usually has a special w/ 5qts and Purolator filter for about $15.

[shortdogg2k05]

Why does everyone say not to use a fram filter?

[6g72lover]

a 6g72 few qts of oil should have
4qts
5qts

[mrg7243]

Why does everyone say not to use a fram filter?

x2 thats what i have on right now

[boochieboy]

Because if you ripped one open you would see that the endcaps are made of cardboard, whereas most all others are steel. If cardboard endcaps are soaked in oil what happens is they may start to fall apart and get into the entire engine....or at the very least, they may let dirty oil pass right by. And the filter paper also has fewer pleats than others. I think Purolator PureOne filters are by far one of the best filters you can get for the $,,,although Wix and K&N are solid too but pricier.
Here's some cut open:
http://minimopar.knizefamily.net/oilfilters/index.html

Also, OP....when deciding whether to use synthetic or conventional oil mileage means nothing. I don't know what idiot started the whole "if you have a high mileage vehicle you shouldn't use synthetic oil" crap came from. And if you're in Mass. why wouldn't you run 5W30....especially now that it's getting colder?

[99galantES]

i ended up using pennzoil platinum 10w-30 but cars timing is off so i might switch back to reg oil for now and save the synthetic for later