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Old 09-12-2018, 02:29 AM   #1
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Default Change all the fluids

I'm headed to houston in a couple of days to pick up my new (to me) 2015 Roadtrek 190P. Due to lack of service records, i've decided i'm going to change all the oils..Completely, filters, etc... any things that should have had regular maintenance... I've gotten fluid analysis, and nothing is awful, but some are not as clean as they s/b.

The RV will be living in North Florida, although we will be traveling much of the country.

Any specific fluid recommendations ? (I already have sea foam on the list)..
Any specific instructions to the dealer / shop to make sure nothing is missed ??? I'm one of those car owners who brings in their car and asks for "standard maintenance".. transmission, engine and generator.
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Old 09-12-2018, 04:10 AM   #2
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How many miles on it?

I'd recommend Mobil 1 synthetic and a Purolator oil filter for the engine and recommended fluid types for the rest of the vehicle.
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Old 09-12-2018, 05:25 AM   #3
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I've got an old 1997 PW. I just returned from Glacier and had the 60k service done. That was basically brake check, lube, tranny fluid and filter, rear end drain and refill. The other things on the list...plugs, oil change, oil filter, air cleaner element...I do myself.
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Old 09-12-2018, 11:13 AM   #4
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Take notes from the manual as to what fluid specs need to be met. When I was new to Class B's & had a fairly new unit I let a quick lube place drain the differential and it was Bobojay here on the forum that caught that they put in the wrong oil. The quick lube place paid for a GM dealer to drain & replace with the right oil but that extra trip & time wasted could have been avoided if I knew or had a list of what oil was required.

I've standardized on using Napa Gold oil filters on all my vehicles. Apparently they're made by Wix. They have a good reputation on forums etc.

Confirm how many grease points there are on your model year. There are 15 grease zerks on my '97. I think 2003's & newer have 11 zerks but hopefully folks with the newer Chevy vans will let us know how many grease points they've found.
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Old 09-12-2018, 11:48 AM   #5
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11 grease fittings on the Chevy. Have the steering linkage checked: Pitman and idler arm are weak points on these vans if not lubed regularly. Make sure an experienced person does the lube. I normally do my own work but on my 10,000 mile trip last summer I had a Grease Monkey quickee lube place do my oil change and chassis lube. When I got home I removed a front tire and noticed grease on top of the ball joint. I checked other fittings and the tech had not put the grease gun securely on the fitting and shot grease all over the outside of the fitting and not into the joint. Then when I changed the oil I found that the oil filter was loose.
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Old 09-12-2018, 01:08 PM   #6
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A couple of things to consider based on what we have found on our Chevy.


Brake fluid flush and change usind Dot 4 fluid for some higher temperature protection. I like Castrol brand of Dot 4 and have had good success over many years of use. Many people never change brake fluid, which is not a good idea.



Transmission fluid we use only "approved" Dexron VI fluid. Don't use the multipurpose fluids that claim they can be used for multiple applications, as they can have issues. We use Valvoline Dexron VI, which has worked well and is fairly reasonable in price compared to the Chevy fluid. Cheapest at Menards, of all places, around here.


If you have the trailer towing package, don't use any of the rear axle lubes that say they can be used in limited slip axles as they contain an additive for the limited slip part. The locking axle in the Chevies is a true locker and not a limited slip and is speced for non additive oil. The non additive oil is getting hard to find in some places. I like to use Redline 75W90NS oil but have to get it online or a high performance shop. The NS is the non additive part of the number. If it is a standard, non locking, axle, any good full synthetic like Amsoil is OK with or without the additive in it.



Engine oil is usually Redline synthetic for long interval trips and Mobil 1 otherwise, which I know is unusual, but I am doing a bit of a test. Redline is a group 5 synthetic which has tremendous heat tolerance and has full antiscuff additives like older oils, but has a sometimes claimed tendency to harden rubber seals (unproven problem at this point, though). Mobile 1 is a group IV or maybe group III, they won't tell you which, has less temp tolerance and you have to add antiscuff additives if you want them. Group III and IV oils are sometimes claimed to soften rubber seals too much so might balance out the Redline. Of course, the most likely answer is that neither have any rubber damage issues and the claims are competitive espionage from competition. Wix filters for all our vehicles, with an upsized one used on the van 6.0.


The next two are somewhat controversial so personal choice.


The power steering fluid also runs the Hydroboost brakes, so it gets a real workout. I found that the original fluid was quite discolored within 10K miles. Assuming that heat was a likely culprit, I read up on Hydroboost applications, and based on what the off road truck folks had to say (they severely stress Hydroboost systems), flushed the fluid and replaced it with Amsoil D4 synthetic automatic transmission fluid. The specs for viscosity and such are similar, but the D4 some better temp handling. At the same time I cut a "window" in the OEM rubber front spoiler, which is behind an opening in the Roadtrek plastic front bumper, to allow more air to the power steering fluid cooler which is behind it. My impression is that brake effort was reduced a bit and steering may have gotten a bit easier also. The D4 has been in for about 30K miles and still looks good.


For the coolant, I am not a fan of Dexcool, as they just have had too many issues with it, and I think there are less trouble prone options. They may or may not have all the issues fixed, but it is still very important that Dexcool not be allowed to get old or contaminated as it can get corrosive on things. The old "green stuff" is commonly used to replace Dexcool by lost of people, but it generally is considered to be shorter life and not as good in the engines that have much more aluminum than they used to in them. We finally settled in on using GO5 rated coolant, which is fairly common in many newer vehicles and readily available. Zerex brand is common around here, so that is what we got. No problems that I know of in either of the two GM vehicles we have, but without seeing the engine internals there is no way to tell if things are better or worse.


As always, remember if you stray from the GM recommended products, you do so at your own risk, but you can also, IMO, get better results and lower costs with non recommended products in some cases. Trans fluid is the exception for me on using factory spec rated products, as transmissions and fluids do need to work closely together to get the right clutch engagement feel and durability. Hondas do seem to be somewhat an exception as nearly all their fluids are somewhat special, so we stick to more of the factory fluids on DW's CRV.
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Old 09-12-2018, 01:21 PM   #7
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Quote:
Originally Posted by booster View Post
Wix filters for all our vehicles, with an upsized one used on the van 6.0.
What Wix model number are you using?
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Old 09-12-2018, 02:26 PM   #8
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What Wix model number are you using?

Wix number is 57045, and I think the NAPA gold number is the same and is the same filter.


The Wix website is nice as you can pull up the specs on the various filters to compare them. This filter appears to just be a longer version of the stubby that GM uses on the 6.0. The big thing is bypass opening pressure in most cases, and of course the thread and physical size including seal location.



You will often hear that the bigger filters are not needed as the small ones don't ever collect enough debris to actually not function right, and this is true, I think. For me, the bigger filter means more filter area, which means less pressure drop, which means the filter spends less time in bypass where it isn't filtering at all.
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Old 09-20-2018, 05:04 PM   #9
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Quote:
Originally Posted by bwolfsohn View Post
I'm headed to houston in a couple of days to pick up my new (to me) 2015 Roadtrek 190P. Due to lack of service records, i've decided i'm going to change all the oils..Completely, filters, etc... any things that should have had regular maintenance... I've gotten fluid analysis, and nothing is awful, but some are not as clean as they s/b.

The RV will be living in North Florida, although we will be traveling much of the country.

Any specific fluid recommendations ? (I already have sea foam on the list)..
Any specific instructions to the dealer / shop to make sure nothing is missed ??? I'm one of those car owners who brings in their car and asks for "standard maintenance".. transmission, engine and generator.
Since I'm a GM guy & retiree, (and my name was mentioned earlier), I guess I better chime in here.
Since you didn't mention the mileage on the van let's go with more or less than 50k...
If less, I wouldn't worry about the differential, if more Amsoil Severe Gear 75w-140, if doing yourself, then run that for 100k miles

Transmission, I think I'd let a GM dealer do that at 50k (and the differential too while there). Be more $$, but you'd know you got the right fluids. Transmission every 50k (while there, have them do a brake check and fluid flush too)

For sure do an alignment either at a Chevy dealer or someone who can get that heavy vehicle, that you trust on their rack

Wix, NAPA, or AC filters only for engine and air (NAPAs are made by WIX)

Personally I don't like Mobil 1. I only use Amsoil Signature series in my vehicles, whatever weight the manufacturer calls for. My second choice is Pennzoil Ultra Platinum (notice I said ULTRA Platinum). Or if you have a dealer do the oil change, you can take your own in, and get it greased. Get the front end checked also like was said above. They will do that while doing an alignment.

Antifreeze, if the chassis is over 5yrs old, which it probably is right at that age, I'd change it. Have the dealer do that also if you take it to one to do any of the above, otherwise, myself, I'd stick with OEM fluid recommendation on that.

Power steering fluid? I'd change it out also with what was recommended above. Amsoil now makes a power steering specific fluid.

Remember your tires, if OEM, are getting real close to the max age limit, 5-7 years. Nothing to skimp on for sure.

Tire brand and oils are a couple of those subjects that have 1 thousand opinions in 1 thousand people. Use what you are happy & comfortable with is my say
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Old 09-20-2018, 05:30 PM   #10
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Nothing wrong with bobjay's recommendations, and as he says 100 people will have at least 100 opinions.


The one thing I would point out is that from what the local drivetrain shop told me (too late as it turns out) is that they have had trouble with Amsoil Severe Gear in the GM Govlock autolocking differentials. The Govlock is used in the van if you have the trailer towing package. They are an amsoil dealer, so not conflict of interest, I think. The big deal is with the limited slip additive in the Amsoil, as the Govlock is designed to run on conventional oil, and in the 75W90 weight.



I put in Severe Gear when I changed out our semi floating rear axle to the Govlock equipped full floater. No problems with noise or heat, but we did get one unintended partial lockup while doing a quick parking lot turn around loop. When I explained what happened to the driveline guys, they said they had seen it before and it went away when they took out the Severe Gear or other limited slip additive dosed oil and put in non additive oil at 75W90 weight. It is getting difficult to find the non additive oils, especially in synthetics, but there are still some around I think. I will be changing ours to Redline 75W90NS which is non additive gear oil. I don't know if the GM oil has additive or not, just that it is crazy expensive.



The normal, open, differential can use oil with or without additive, so the Severe Gear would work in them without issue.
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