mobil synth s 10w-40...any good?

[snake]

Hey has anybody tried this oil, its not the mobil one stuff, retails for about $35 a bottle.

[Busky2k]

Yeah its not bad, the bare minimum I'd use in a turbo.

[Guest RedLineGTR]

The problem with oils like that is that they are a mix/blend of what i dunno?? Different doses of specific lubricants, elements, chemicals etc...It’s more of a semi-synthetic and for 10-20bucks you can get a oil that is more based on a full sythetic oil such as mobil 1 or motul etc. It’s usually worth the money especially in a turbo based car which experiences high temperatures. My 2 cents

[Guest two.06l]

castrol formula r outspecs anything on the market at the moment.It does not thin out like most oils that run through turbo core.Most of the top drag teams run it $60 for 5 litres is cheap insurance for a $5k plus engine

[snake]

cool.

[dangerous_daveo]

Yeah, I've used it a coupe of times. Not too impressed, I feel my fuel economy etc is a little less. Before I was using valvolvine 10-40 semi synth something, I felt that was better. But this time Im going to try a full synth, see how that goes.

[Kinks]

semi synthetics are only around 15% synthetic. 85% is plain old mineral oil.

i would always use a full synthetic in a turbo'd motor (run-in period excepted of course).

[kingscorp]

How do you know semi-syns are 15% synthetic and 85% mineral?

[Busky2k]

Kinks is right, its only about 20% syn, 80% mineral. Sure its better than straight mineral, but I'd still try and fork out a lil extra and get a full Synth.

[Guest RedLineGTR]

in simple terms go for what is in your budget and what you can afford. If i could afford it i would be using redline royal purple etc...but i dont have money for the high priced genuine full synthetic oils.. : (

[predator]

nah.. its fine.. changing the oil regularly is more important than what you use as long as its not too shithouse.

I don't think they're as high as 85% mineral.. they're rated for turbo engines. It wouldn't say it on the bottle unless it was safe to do so. In fact there is probably **** all difference i reckon, other than the name and marketing associated with the expensive stuff.. but of course I'm not a chemist so couldn't determine that empirically..

Been using it for 18 months or so in mine, no problems. Doesn't seem to break down and go black that quickly, so i assume its doing its job reasonably well.

[Busky2k]

Makes perfect sense RedLineGTR. However, your better off getting say, a bottle of Shell Helix Synthetic ($45) and keeping that for 10,000ks than say, Castrol GTX Magnatec ($25) and keeping that for 5,000ks.

You dont need to buy stuff like RP/Redline for good oils. Mobil 1, Castrol R, Shell Helix Ultra etc are well suited to a daily driven GTST and dont cost the earth. Redline/RP are overpriced IMO and only is worth it if u drive ur car hard on a regular basis.

[Kinks]

I always used mineral oil in my charade, and that thing got fanged off its tits. pod, exhaust, cams and a 7500RPM rev limiter. 140,000km and it had 61.5fwkw :bahaha:

[Guest RedLineGTR]

i personally use shel helix ultra about $45 bucks a pop usally have it for 5000km sometimes i change it after a hard day of some mountain runs etc...oil pressure is good, oil temp is good. Seems to do what it is meant to do.

[kingscorp]

I dont want to sound like an arse, but you guys dont know what you are talking about!

Semi synthetics are not made up of a mix of synthetic and mineral, in most cases they are a mineral base thats been hydrocracked to perform like a synthetic. Base oils come in 4 different groups 1, 2, 3, and 4

Group 1 = Basic oils like chain lubes.

Group 2 = Most Oils like engine oil, gear oil, hydraulic oil, industrial oils

Group 3 = Highly Refined mineral oil (Semi Synthetics) High performance Lubricants, Engine oil, gear oils and other high performance lubes

Group 4 = Polyalpholefins or POA (Fully Synthetic) (Man Made) Extreemly high performance lubes for high temperatures or extended drain intervalls

Group 3 oils are sometimes listed as synthetic because the chemical structure of the base has been changed by man so therefore its man made and hence called synthetic.

I hope i haven't up set to many people but i had to explain how it works or im going to go nuts reading some of these posts.

Any Semi synthetic or fully synthetic is going to perform well above what you guys are going to put it through, so long as you change it at regular intervalls.

[red900ss]

good stuff kingscorp

[Guest RedLineGTR]

if you wanna find out what oil is good for your car and all the technical shit etc..lalalalaa use the search all of this has been posted before and covered more than enough i cant be bothered posting up the same thing.

[Busky2k]

kingscorp, some of your information is kinda wrong. So dont say we are completely wrong! Hehe Im not going to retype out the info so just go here for a real rundown of the API Grp listings.

Grp I- solvent refined petroleum base stock.

Grp II- hydrotreated petroleum base stock. More refined, with less gunk in it. More stable, and usually with a higher viscosity index. Chevron and pennzoil oils use nothing but this group in their oils.

Grp III- "hydrocracked" or severely hydrofinished base stock. Castrol won the right for oil blenders to call this group "synthetic". Most OTC synthetics are made from this base. I think they use the same process to make it as GII, but take it a step further.

Grp IV PAO base stock. Chemically produced from ethelene gas. True synthetic oil, and primary basestock used in mobil, amsoil and most top tier synthetics. Much more stable and has higher VI index than GIII. Can handle more extreme temps.

Grp V ester base stock. used in most synthetic oils for miscibility, and is primary base used in redline and a few others. Extreme natural detergency and cleaning ability. Strong attraction to metal. Can withstand more extreme temps than PAO.

FYI, a classic semisynth like Castrol Magnatec, Valvoline Durablend IS a mix of a Grp I and III oil altho the percentages can vary. It can be only 1 drop of synth per bottle and they can label it semi synthetic.

Castrol GTX/2/3 etc are Grp 1 oils, and arent just chain lubes. Grp 2 oils are oils like Penzzoil Purebase, Group 3 includes Shell Helix Ultra, the cheaper Castrol R 5W-30. Grp 4 is Mobil 1 Supersyn, Castrol R 0W-40 etc and Grp 5 is Motul 300V, Redline etc.

If you wanna know more about oils, go to this excellent resource;

www.bobistheoilguy.com

[dangerous_daveo]

Now now, no one likes a smart arse

[Guest Moses]

What you have said is pretty much the same as I described. But if Shell found out that you reckon that their top tier product Helix Ultra was a group 3 product they wouldn'e be happy.

Oil companys use the different base stocks just in different applications. To say that 1 particular brand only uses one type of base stock is incorrect. I work for one of the major oil companies and we use all of the different Bases in different percentages in many different products.

Your last comment is completly wrong

(note this post is from Kingscorp note Moses, I was on Moses computer)