semi or high synthetic oil

[shaggy]

i have managed to get a case of millers high synthetic oil XSS 5w30 (4x5 ltr)
here it is http://www.millersoils-online.co.uk/...UTO_RETAIL.htm
i have done an oil change using it and all seems well
i am of course worried it may be a little too thin
whats your views guys
p.s.
i payed £20 for the case

[The Lang-Shankit Scunner]

Wouldnt use it in summer but it will aid for better cold starting and protection first thing.

Long term I use summer= 15-40 semi
Winter = 10-40 semi

I have had best results with these viscosities

[plumb bob]

There is a list of recommended oils depending on ambient air temp, I think it,s on Matt's site, but it may be in the FAQ's on this site.

I'd also say it's a bit thin, unless you live in the north of Scotland

[madison]

I have just got all the gear to do a service from Toyota.
The bloke said that they recommend 5-30 semi.
Now I am confused.

[The Lang-Shankit Scunner]

I have just got all the gear to do a service from Toyota.
The bloke said that they recommend 5-30 semi.
Now I am confused.

Its because toyota at the moment have an enormous amount of 5-30w oil i was asking at the last dealership i visited, it comes in a mazda bottle and is for a diesel particulate filter. Its cheap enough but i woulndt trust its integrity under load on such an agricultural typr engine.