2ww Oil consumption - Is there a cure?

[TheAventbus]

Good day Ladies and Gents, 

I've recently begun to learn that my 2015 Avensis is a bit of an oil burner. The car was at Toyota last week for an EGR cooler recall and required some to top up. 

Although I do my own servicing on it now, I had neglected to do regular checks on the oil as the engine produces no smoke or leaks. 

The burn rate is a 'mere' 1 litre per 2000 miles (0.5 per 1000) - which I think is excessive in any car but unusual at how clean running mine appears to be! 

I know there is much written about 2WW engine issues but the question I have to the Toyota boffins and gurus on here is; What fixes it? Is there a reliable cure for this? I don't believe the issue to be piston rings or valves not sealing as the car starts easy, delivers power as expected and can achieve +60 MPG on a good run (driven attentively). So I'm more inclined to believe it's a gasket or oil seal but I lack good knowledge of this engine. 

I do fundamentally like the car and I would describe myself as a longer term car owner (my other car is a 2000 Skoda Felicia!). 

 

Thanks for any information you guys have!

 

James

[2009joe]

On 11/27/2021 at 9:26 AM, TheAventbus said:

Good day Ladies and Gents, 

I've recently begun to learn that my 2015 Avensis is a bit of an oil burner. The car was at Toyota last week for an EGR cooler recall and required some to top up. 

Although I do my own servicing on it now, I had neglected to do regular checks on the oil as the engine produces no smoke or leaks. 

The burn rate is a 'mere' 1 litre per 2000 miles (0.5 per 1000) - which I think is excessive in any car but unusual at how clean running mine appears to be! 

I know there is much written about 2WW engine issues but the question I have to the Toyota boffins and gurus on here is; What fixes it? Is there a reliable cure for this? I don't believe the issue to be piston rings or valves not sealing as the car starts easy, delivers power as expected and can achieve +60 MPG on a good run (driven attentively). So I'm more inclined to believe it's a gasket or oil seal but I lack good knowledge of this engine. 

I do fundamentally like the car and I would describe myself as a longer term car owner (my other car is a 2000 Skoda Felicia!). 

 

Thanks for any information you guys have!

 

James

boss think there is no fixes for those bmw n47 engines is it possible to get rid of it and go for the  toyota before the bmw engines i bought one of the last 1adftv engine cars a 2014 toyota avensis business edt .nice car but im like you i hope to keep it for a long long time my las one a seat toledo 1.9tdi had it for 11 years great going yoke was still going great when i sold it on .my one came with 38k original genuine toyota stamped also log book clean car. picked it out online and a buddy of mine whos a car dealer got it for me got it on the bca auction site 

[Call me Ishmael]

Looking around on the forum, I came across the post below. One of the members suggested cleaning the crankcase ventilation valve. It might be worth a try?

Can anyone else shed some light on the problem?

 

[TheAventbus]

****UPDATE****

At the start of December I got my Avensis serviced and into the fresh new oil, I added a product called Forté 'Oil Fortifier'. The product aims to stop oil getting burned off by the engine and, in my case, it seems to have worked!

The car has since driven about 2,000 miles (3,200 km) and has only required 1/4 litres to top up. (topped up when the car was back at Toyota on a warranty item - the crankshaft pulley, another common issue on this engine. 🙄 Worth getting checked out if you notice a chattering sound or rattle from the engine at idle). Although, I dip the car weekly now and didn't notice any drop in the levels. Nonetheless, 250 ml over 2000 miles (125ml/1000mile) is a big improvement and could be seen as fairly negligible. 

I'm not saying this is a general replacement to engine maintenance or corrective action and the long term effects on the engine I can not be sure of. These engine oil additives do also carry a 'snake oil' reputation, so I understand if this product just isn't for you. In my case, with my car burning so much oil, my judgement was that oil fortifier wasn't going to make the engine condition any worse. 

 

I found the product from this guy below. More of a BMW specialist (and a bit too persistent in his methods and ideas) but perhaps applicable to the 2WW engine. 

 

Thanks for reading.

Please let me know if you have any thoughts or ideas on this 

 

James

[Call me Ishmael]

The oil fortifier probably increases the viscosity of the engine oil, which prevents so much of it getting past the piston rings. I can't imagine it doing any harm, so long as you don't flog the living daylights out of the engine when it's cold.

I spoke to the service guy at the Toyota dealers about high oil consumption in the BMW-engined Avensis and was told that it was supposed to do that in order to trap soot particles and burn them off in the cylinders. I don't pretend to be a mechanic, but I've been servicing my own cars for almost 40 years and have never heard of that one! If that's the case, why doesn't it have high oil consumption from new? Why does the problem only manifest after 70-80,000 miles?

Apart from a 2-stroke, I'm not aware of an engine that is designed to consume oil at the rate quoted. It all sounds like a bit of a yarn that the dealer is adopting as his official line on this. Any thoughts anyone?

[2009joe]

2 minutes ago, Call me Ishmael said:

The oil fortifier probably increases the viscosity of the engine oil, which prevents so much of it getting past the piston rings. I can't imagine it doing any harm, so long as you don't flog the living daylights out of the engine when it's cold.

I spoke to the service guy at the Toyota dealers about high oil consumption in the BMW-engined Avensis and was told that it was supposed to do that in order to trap soot particles and burn them off in the cylinders. I don't pretend to be a mechanic, but I've been servicing my own cars for almost 40 years and have never heard of that one! If that's the case, why doesn't it have high oil consumption from new? Why does the problem only manifest after 70-80,000 miles?

Apart from a 2-stroke, I'm not aware of an engine that is designed to consume oil at the rate quoted. It all sounds like a bit of a yarn that the dealer is adopting as his official line on this. Any thoughts anyone?

well tbh toyota dont care after the 1adftv toyota engine and moving to the bmw engine well toyota wants to move on to hybrid petrol or Battery engines think you ask me diesel engines are a dying breed so kina going to baby my one make it last then hope Battery ones or those hybrid ones will come down in price by then