I purchased some oil, Castrol GTX 10w40 from carparts4less

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What i received was this



As you can see on the front it says for Gasoline and diesel and lpg engines, well i've never run my car on cheap USA fuel. So does this mean the oil is for US market not UK, and is somehow different?

 

Why are you only running part synthetic and not fully synth ?

 

The grade of the oil is the same so can't see the actual oil in the can being any diffeent

 

On a classic?

Fully synthetic doesn't come in 10w40 normally 5w30 which is not what is recommend for my car

 

thats what i put in mine , 1997

 

Go full mate it's best

 

Magnatec isn't recommended for Imprezas. Millers CFS 10w40 is available in fully synthetic.

 

Who says that?

 

Always run mine on mobil ...

 

go for Fully synthetic and try ether 5-40 or 10-50 Millers CFS 10w40 is a good one talk to oilman he's got a thread on er he will tell you whats what he nos his oil https://www.scoobynet.com/692978-oil...s-here-19.html

 

https://www.scoobynet.com/showthread...=826165&page=2

Funny thing is you actually comment on that thread so should already be aware of this.

 

regardless of what certain "specialists" advice i would not use a 5w oil in a classic in general terms......

 

in last 12 mths i done 268 miles and i,m dumping my oil .

i always use 10-40 millers

 

Castrol, along with other oil brands are constantly changing their oils...well their branding to be more precise.

As a garage, its a nightmare: We stock Castrol oils, and use the most suitable oil for each vehicle based on manufacturer specifications, in principal it sounds easy, but it isn't.

For example: Edge 5w-40 C3...Magnatec 5w-40 C3....its the SAME OIL (both full synthetic, both comply to the same vehicle manufacturer specs and have the exact same properties on the data sheets). Just with a different label. I defy anyone to tell me I'm wrong, the difference is the price tag and the label.

Anyhoo, Magnatec 10w-40....old school semi-synthetic oil. My Classic MY97 scoob ran it...oil changed every six months, I wouldn't leave it in there any longer IMO.


Edit: also GTX 10w-40 vs Magnatec 10w-40...both almost the same, but they differ very slightly in physical composistion, and when I say slight I do mean slight. But GTX has very few manufacturer approvals. I would go out on a limb and say Magnatec 10w-40 is based on GTX 10w-40 with a little added magic (viscosity improver? ).

 

Oh God. Another oil opinion thread...

 

When I got my car it used 1ltr of oil per month, now I have 50% compression loss on 1 cylinder and 20% loss on another it uses around 1ltr per 6 months.

I kinda presumed fuel passing the rings was topping it up for me but I get no suspect smells or smoke.

 

Ha ha well found, man i had forgoten about that, dam memory

 

The main reason i use Castrol magnetic is i change my oil every roughly every 2000 miles, as i reckon more frequent oil changes are best. Millers 10w-40 costs double of magnetic, so i'd be moe inclined to leave it in longer, so the question is which is best 2 oil changes of gtx in 4000 miles or one of Millers Oils CFS 10w-40?

 

Castrol edge 5-40 Fully synthetic is £36 at ASDA lol its the same price as the Magnatec 10w-40 so still cheap and a goodone to use for the price. u can still change the oil every 2000 miles like you do but with a better oil. my manual recommends 5-30 for my Subaru so 5-40 should be good

 

Yea but is yours a newage Impreza, as i would never use 5w-40 in a classic

 

mines a 94 wrx its been running on 5-40 for a wile now last 5 oil changes. people do tend to think its thin but works good for me. I am changing to 10-50 after the map but trying to find out if that will effect my engine in anyway because I been using 5-40 for so long..

 

Yea i wouldn't use anything that thin bud, Subaru recommend 10-40

 

Allways used 10-40, was going to replace with 10-50 but will let the new owner do that.

 

Had a reply


Hi

Thank you for your email.

This oil is suiatble for petrol and diesel engines, Gasoline is just another word for petrol.

Kind regards