Yes, I know, talk about synthetic oil has been beat to death around here. With all the back and forth, I'm curious to know who has put significant miles on the 8 using nothing but pure synthetic oil (group IV or group V).

To keep this from becoming a flame war, I'd really just like synthetic oil users to post the following:

- Oil type
- Oil grade
- Miles using that oil
- Significant problems and/or engine replacement

 

royal purple synthetic
5w30
12,000
none.

 

if you have to ask, just dont use it

Saves everybody's time.

 

the end, thx buddy.

 

NY is just afraid of jinxing his second engine.

 

rofl

I swap the 5w20 out a week something after I got my car back. Its gonna be ALL Synthetic baby !

no 5w20 bullshit of course, 20w50 all the way (and 15w50 or 10w40 for winter months )

 

32K miles--I have used Royal Purple 5w-20 since new.

I have 10w-30 in there now and will stick with that oil weight from now on.

I've had no problems.

 

damn NYC is def not taking a change on this motor.....20w50.....hell just but 75w90 in there shuld keep the wear down on the seals and bearings.....(and of couse will help that it's so thick it prob won't spin anythign) haha

 

with the amount of oil my car goes through, i wouldn't want to spend the extra money on synth.

in fact, i really don't understand running synthetic in this car. i mean, doesn't it resist burning? this car is supposed to burn oil, right?

and i'd be careful with very heavy oils too since you don't want your pressure to go too high. what's the clearance like in these things anyways? oil as heavy as nycp runs, i would postulate, slow you down.

i know there's lots of threads on this, and i haven't read any of them. this is just my 2cents. and it's usually worth far less than that.

sorry op for not following the guidelines. it's funner for me this way.

 

current miles: 45k
miles with synthetic: ~40k
Mobile 1 full-syn: ~25k
Royal Purple: ~15k
Original Grade: 5w30
Current Grade: 10w30

Problems: zero *knocks on wood*

w00t w00t free post

 

'05 MT, 65k miles
miles with synthetic: 62K (switched to Royal Purple at 3K)
Royal Purple 5w-20 until 50K
Royal Purple 10w-30 from 50K to present
no premix
zero engine problems

 

Hey i didn't follwo the rules either myriad! haha

 

royal purple 5w20 75,000 i probably had my first 3 oil changes with regular mazda crap

 

I used royal purple 5w-20 on my first motor starting around 30k, it blew at 84k. Either going to use 5w-30 or higher, and premix this time around.

 

if you talk about Gear oil's 75w90. is not the same rating as motor oil. 75w90 is something like 10w40 for motor oil.

if you mean motor oil, I do not recall any motor's that thick. the heaviest one I've seen was 60 wt motor oil.

if you want to argue about oil weight, take the manual out and read it.

if you want to tell me 5w20 offers enough protection, go read Castrol's site

if you wanna tell me my engine has failed. go read Mazda's recall.

Thank you

 

^just a joke NYC...I'm not saying at all that 5w20 is ok....all was a joke...haha

 

Die !

 

40,000 mi on car, 37,000 on the "dreaded" Mobil1 synthetic.

Mostly 5W30, but last summer started topping off with 0W40 and have gone exclusively with 0w40 the last 2 changes.

 

maybe we should run thicker oil in our trannies HAHAHAHAH

 

I would like to see more info, More people need to post!!!!!!

 

Mobil1 5-30
10K miles
Used since first oil change on new engine
pre-mix Idemitsu secret sauce 1/2oz per gallon every fillup
no problems.

 

40,000 miles on car
30,000 miles on synthetic
Mobil 1 10W-30
No premix
No problem

 

RP 5W-30, 65,000mi, no issues or engine problems.

 

I've posted this before...my brother ran his Toyota for 75,000 miles on the original factory oil, which I presume was dino.

Just for fun, as long as I'm reposting, attached are a couple of items that I downloaded from other posts on this site.

Ken

 

I've never seen that before.. curious