Fall preparations: engine oil, air filter, throttle plate, and transaxle oil

bwilson4web · 10-04-2009, 07:28 PM

Hi,

I changed the ICE oil and knocked the dust out of the air filter. I'll swap it in the spring. The windshield wipers are still in good shape. But the throttle body cleaning was interesting:

You'll notice a dark carbon deposit to the right of the throttle shaft at the bottom. A shot of throttle cleaner and a narrow brush and it is gone. This sticky deposit in cold weather can keep an engine from starting and lead to a service call. It is better to clean it out in the fall before the cold, wet weather arrives.

The transaxle oil was good news. After 27,000 miles of service it was translucent. Murky but not opaque, it smelled like oil and actually looked better than the 2010 transaxle oil after 5,000 miles. This is Type WS in an NHW11 transaxle. I'll be sending this sample for testing but if the numbers come back looking good, I'll probably up my change interval.

Bob Wilson

2009Prius · 10-09-2009, 09:35 AM

Quote:

Originally Posted by bwilson4web

...

The transaxle oil was good news. After 27,000 miles of service it was translucent. Murky but not opaque, it smelled like oil and actually looked better than the 2010 transaxle oil after 5,000 miles. This is Type WS in an NHW11 transaxle. I'll be sending this sample for testing but if the numbers come back looking good, I'll probably up my change interval.

Bob Wilson

I was going to do an early transaxle oil change. Could you take a look below and comment?

Transaxle (or engine) oil change surface exposed unprotected if not driving soon after?

bwilson4web · 10-10-2009, 02:16 AM

Quote:

Originally Posted by 2009Prius

I was going to do an early transaxle oil change. Could you take a look below and comment?

You've got the right idea. I would recommend having a dry, container to grab a sample. If it looks ugly, testing might be a good idea. If it is mostly clear, I wouldn't worry about testing. Your call.

I use R&G Labs in Tampa FL and also get a viscosity index test. This allows checking the viscosity change at 40C and 100C. The goal is to see how much the viscosity has gone down ... 15% is the wear limit R&G recommends.

Bob Wilson

statultra · 10-10-2009, 11:04 AM

How did the WS fare in the NHW11 specifically compared to type T?

I put WS in the 01 about 10k miles ago, but since the battery has been out i havent got to driving it.

10-04-2009, 07:28 PM	#1
bwilson4web 03 and 10 Prius Join Date: Nov 2005 Location: Huntsville AL with 2003 Prius Posts: 3,843 My Car: 2010 Prius Model: III Package: #1 Thanks: 145 Thanked 366 Times in 202 Posts Friends: 20	Fall preparations: engine oil, air filter, throttle plate, and transaxle oil Hi, I changed the ICE oil and knocked the dust out of the air filter. I'll swap it in the spring. The windshield wipers are still in good shape. But the throttle body cleaning was interesting: You'll notice a dark carbon deposit to the right of the throttle shaft at the bottom. A shot of throttle cleaner and a narrow brush and it is gone. This sticky deposit in cold weather can keep an engine from starting and lead to a service call. It is better to clean it out in the fall before the cold, wet weather arrives. The transaxle oil was good news. After 27,000 miles of service it was translucent. Murky but not opaque, it smelled like oil and actually looked better than the 2010 transaxle oil after 5,000 miles. This is Type WS in an NHW11 transaxle. I'll be sending this sample for testing but if the numbers come back looking good, I'll probably up my change interval. Bob Wilson __________________ - NHW11 - ZVW30 A hybrid specific web site. Last edited by bwilson4web; 10-04-2009 at 07:31 PM.

10-10-2009, 11:04 AM	#4
statultra uber-Senior Member Join Date: Dec 2005 Location: cape coral, FL Posts: 682 My Car: 2005 Prius Model: Package: #9 Thanks: 0 Thanked 4 Times in 3 Posts Friends: 0	Re: Fall preparations: engine oil, air filter, throttle plate, and transaxle oil How did the WS fare in the NHW11 specifically compared to type T? I put WS in the 01 about 10k miles ago, but since the battery has been out i havent got to driving it.

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