I am debating whether to use it or not. I don't think I'd like leaving even pure synthetic in my engine for over 6K because engine contaminants still accumilate even if the oil isn't breaking down.

If any of you have noticed any signifigant improvements by using synthetic please share your experiences.

 

If you have a stock motor then synthetic is pretty much pointless. After i/h/e, i switched to synthetic. Although it wasn't something i had to do, its what i've always done. After i start improving performance, i switch to synthetic.

If you are changing your oil every 5-6k you should stop. Well, this is my opinion but i have found my motor(s) for previous car and this car runs a lot better when changed every 3k. If it does improve gas milage, i have yet to see any improvements. Synthetic oil stays cleaner longer, and helps performing motors keep performing they way they should. (hints why most sports cars come with synthetic oil from the factory)

Its up to you, so good luck either way.

Cya

 

synthetic oil will do NOTHING for performance or mileage and will only help longevity when you start thinking about over 200k miles capability.

 

i all depends on your budget... like it was posted above.. syth really does nothing for you in the way of performance and even gas milage (depending on who you believe and what you read).. but does help longevity of the engine (proven).. especially seals.. you will get varing arguments as to when you should switch or not... i have had syth in the tc engine from the 1000 mile mark.. with absolutly no problems.. started with mobil 1... and this last oil change i switch to royal purple seeing it was only 60 cents more then mobil 1.. i change the oil at around 4000-4500 mile intervals.. does it get expensive..? sure does.. is it worth it..? IMO.. sure is......

having said all that... if you plan on changing your oil regularly.. say 3500 to 4000 mile intervals.. i see no reason, if you use a good quality conventional oil your engine should not be just fine..

 

I disagree, (friendly that is) there has been lots of tests with different oils over periods of time with various car manufactures. Its proven that in most performance-tuned motors, synthetic oil helps keep the performance numbers better than regular oil. I have also seen tests that show where synthetic oil can also allow a motor to run longer given that oil be changed on time, runs cleaner.

Of course, 1nz or 2az (scions) are not performance-tuned however, as i stated above its pointless with a stock motor. f/i people especially, i would recommend synthetic oil for the added protection for the overall motor.

Everybody has their own thoughts and opinions on what synthetic can do for a motor, and i respect anyones opinion. I'm just stating mine with experience of personal, and friends. Plus with a few facts included.

Same with tranny oil. Lots of people say that synthetic tranny oil does absolutely nothing. In reality, if you have a built motor it helps keep temp. down, and improves shifts. Especially on automatics. Added whp (not talking about ten) increases inner-tranny temp. and obviously, it works harder. Same concept with a motor, the more built a motor is (especially smaller motors like the 1nz) the harder the motor works. Thats pretty obvious. Synthetic motor oil adds a little more protection, runs a little cleaner and overall is better for a built motor (again, especially smaller motors) vs. regular oil.

Cya

 

i used to drive a 88 honda accord wich was CARBURATED used castrol syntec on it and the milage went up from 27miles/gallon to 32miles /gallon driving 99% hwy . On the box i have been using mobile 1 every 3000 miles and the milage has not improved at all. Funny that the old car got better miles than my my so called econobox which only gets 28/gallon.

 

Most new motors don't see a increase in gas milage just changing to synthetic oil, synthetic's main job isn't to increase mpg to begin with. Those that do see a increase, will only see a 1-2mpg increase.

Cya

 

if u do use it dont go back to regular oil that was used b4 syn oil.

 

Good point. Youre either 100% in synthetic or 100% not.

Cya

 

synthetic blend

Laterz

 

Semi synthetic is honestly no better than regular oil. Its a waste of money.

Cya

 

i would say the idea to synthetic is less fricition = better power transfer and some better fuel economy, parts work less harder to do the same work.

 

I recently switched to Royal Purple oil + man trans fluid.

Gas mileage is unchanged - I check on every fill up.

There seems to be a bit of a HP increase. Easier & quicker revving.
That's my "seat of the pants" dyno report.

I agree that blends make no sense. Use 100% synthetic or standard oil.

 

Thanks for the input, good info.

 

Anytime, thats what most of us are here for anyway.

Cya

 

Not improve it..I think it is all mental...however the engine does feel smoother......maybe it is just me. I used mobile 1 after 1500 miles

 

Synthetic has been known to run smoother, there for free up a few hp. Not enough to actually tell, but it helps in the short and long run. Either way you look at it, synthetic is an excellent choice. But with the 1nz, 1zz, 2zz, 2az motors like these. Synthetic with a stock motor does little to nothing except cleans shifts up slightly. Cleaner shifts would show more with synthetic tranny oil or for automatics atf cooler. But again, highly unneeded unless you have fairly built motor. Wouldn't exactly hurt or make it better.

I also use mobil 1, i have now for the past 13,000 miles. (started around 5,000 miles)

Cya

 

Geez lots of opinions here....little accuracy
only a few oils are true pao synthetics....Mobil 1, Redline, Royal Purple, Amsoil, and German made Syntec 0W30
for accuracy look here
http://bobistheoilguy.com/

 

Good website, but i speak from my own experience. If some of what i said was not accurate than i appologize for false information. But, i don't think i have. Atleast, not from what i've experienced. Never claimed to be a oil god though.

Cya

 

LOL just trying to help peeps out...that site is like the oil bible