Hello all,

 

Firstly I do not want to start any mass-debates or anything just a quick opinion from those in the knowledge on which to use. :dance:

 

I have always used Millers XFS 5-40w and am now due an oil change so was looking at the Castrol RS 10-60w would this be a good move or shall i stay using the same as always?? If it makes any difference my TT is running 12psi and has 67000 miles.

 

Thanks again,

 

Ant

Uh-oh, here we go.... ;) No seriously, I'm going to leave the talking to somebody who knows, however you may find the following useful: http://www.300zx.co.uk/forums/showthread.php?t=34815. I'm now going to hide before I get a belting.

10-50 for me :p

 

REgards,

 

alex

There are many, many posts/argument on this

 

But, To Quote Ryan from Ztech :

 

"I use a 10/40 running in oil to run the cars for the first 1000 miles by millers , then change it to 10/60 millers or castrol"

Thanks guys,

 

I didnt want to start a long discussion just on all the other threads I searched it was so all over the show.

 

I have decided that I will go with 10/60w and see how this turns out.

 

Thanks again.

 

Ant

Thanks guys,

 

I didnt want to start a long discussion just on all the other threads I searched it was so all over the show.

 

I have decided that I will go with 10/60w and see how this turns out.

 

Thanks again.

 

Ant

 

Best thing - just try it as it won't do any harm - see how it goes with oil pressure, fuel economy etc etc.

 

I get on fine with 5w40 - stock Uk engine, 78k miles (always get "textbook" pressure even when hot and no noticable consumption through burning) but running with modifications, higher boost etc the extra heat will demand a higher tolerance oil like 10w60.

 

Although as Alex suggested a 10w50 or 5w50 may be fine too...

 

Talk about worms, cans and opening them............ ;)

 

Richard :rofl:

Where's OilMan When you need him???!!!!! :slap: I am not an expert on this at-all but heres me 10p's worth.. Anything like 10-40w 10-50w or 10-60w will work mint... The last number equates to a higher tolerence so like Richard says if your running higher boost etc the engine will get hotter and be under more stress so use something like 10-50w 10-60w.. Also bear in mind that the oil will also be thicker so it will make a slight sacrafice in performance causing component drag.. (Lotus did a test on this years ago to prove this theroy) eg difference on between 10-40w & 10-60w was worth 20BHP on an ESPRIT!! :nana2: 10-40w being the better...

 

As for manufacturer type I find Millers Oils brilliant :bow: , Castrol stuff is like a watered down pint of guinness!! :duffer: If your engine has covered lots of miles 100,000+ than running a semi synthetic oil will prolong it's life even further & the turbos will benifit too but under 100,000 then fully synthetic will be better for performance resons...

Where's OilMan When you need him???!!!!! :slap: I am not an expert on this at-all but heres me 10p's worth.. Anything like 10-40w 10-50w or 10-60w will work mint... The last number equates to a higher tolerence so like Richard says if your running higher boost etc the engine will get hotter and be under more stress so use something like 10-50w 10-60w.. Also bear in mind that the oil will also be thicker so it will make a slight sacrafice in performance causing component drag.. (Lotus did a test on this years ago to prove this theroy) eg difference on between 10-40w & 10-60w was worth 20BHP on an ESPRIT!! :nana2: 10-40w being the better...

 

As for manufacturer type I find Millers Oils brilliant :bow: , Castrol stuff is like a watered down pint of guinness!! :duffer: If your engine has covered lots of miles 100,000+ than running a semi synthetic oil will prolong it's life even further & the turbos will benifit too but under 100,000 then fully synthetic will be better for performance resons...

 

NO!

 

the 1st number is the oils viscosity when hot, the second is the viscosity when cold. a 10W40 oil has the same viscosity as a 10W60 oil when HOT!

NO!

 

the 1st number is the oils viscosity when hot, the second is the viscosity when cold. a 10W40 oil has the same viscosity as a 10W60 oil when HOT!

 

Wrong way round there mate - the first is the cold viscosity number. "W" is for winter hence 10w means the winter viscosity so a lower first number is better from the cold start. ;)

 

Richard :nana2:

Wrong way round there mate - the first is the cold viscosity number. "W" is for winter hence 10w means the winter viscosity so a lower first number is better from the cold start. ;)

 

Richard :nana2:

 

lol!! correct. i'll get me coat!

Wrong way round there mate - the first is the cold viscosity number. "W" is for winter hence 10w means the winter viscosity so a lower first number is better from the cold start. ;)

 

Richard :nana2:

 

Cheers Rich, you beat me to it on explaining that one!!! :D Don't worry Paul, It all good fun mate - it doesn't make you a bad man!!!! ;)

I use 5w 50 fully syn valvoline, mainly as i get it dirt cheap at work.

 

It works as well if not better than the casrtol rs10w60 i used to always use (cos i could get that dirt cheap from my old work!!!)

AS above, BUT only use fully Synth

If any one wants a pro's and con's of thick and thin oil then catch up with me on my stand at Japfest and I'd be happy to bore you to death with the technicalities!

 

I'm not a fan of 10w-60 and I've explained my reasons many times so we'll not go into it again. I would have said that a fully syn 10w-40 or 10w-50 would be more suitable and yes, you can use a 5w-40 as long as you get enough oil pressure and no excess oil consumption.

 

Cheers

Simon