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Use A5/B5 will no any problem. But it's could consume more oil. When I was use 0W 30A5 on my V70R. It's need add 1 lite per 4000km.


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It says the alternative for A1/B1 is now A5/B5.

Why use A3/B4?
"ACEA A3/B3 and A3/B4 on the other hand require oils with higher HTHS viscosities that may not provide as good fuel economy as an A1/B1 or A5/B5 oil but may offer better engine protection in certain engine designs."

That's why.
 
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